Where do all of you get your forge blowers?
I'm at a loss over here on where to get one.

Mine are just commercially sourced blowers of the type used for inflating childrens bouncy castles. As you are in USA I would suggest:
A shop vac which will blow as well as suck. Probably no need to buy a new one though.
For a small set up maybe a hair drier.
I heard of one guy trying one of the hot air hand driers like you get in a public toilet.
Imagination is the thing. You will find something, probably free, if you work at it long enough. Stuff like the above is good for a bottom draft forge as all the heat is going away from it. Be more careful if you construct a side draft though as the tuyere will get hotter and might lead to damage to the blower so either use a water cooled tuyere or make sure there is a long pipe between that and the blower.

I regulate the speed on mine by connecting them through a dimmer switch. It is cheap, simple and it works.

I use an old kitchen hood blower.

Harbor freight has a 1 hp. 914 cfm. dust collector for $ 84.00 and it made agreat blower. I added a flow gate I made, very easy because outlet is round and an electric speed control. I have used also squirrel cage type blowers I have salvaged from vent hoods and circulator fans.

I got my forge with a firepot and 110v blower from Centaur Forge when they had a clearance sale. I got the whole thing for like $200. It's served me well so far. I hooked a dimmer switch up to the blower and have a lot of control over the air blast.

McMaster Carr or W.W.Grainger Has any size you need and ship world wide
Travis

aww man... my new signature got delorted... Personally i think the language filter is a bit harsh but i can get where they're coming from...

anyways, thanks guys, you've been a real help.
Any other brilliant ideas, don't hesitate to post.

Go to some hammer-ins, there's usually a blower or two in the tailgate sections. Become friends with your local second hand store proprietor. Tell them what you want, and leave your card. I have a friend who has serious yard sale addiction disorder (YSAD). I can't afford to buy therapy for him, so instead, he usually has a hundred dollars of mine tucked in his wallet. I don't have time to hit all the sales, he can't avoid them, it works out fine for everybody. Last year he got a champion 400 blower w/stand for $3, small power drag hacksaw for $15, etc. etc

This is an oil furnace injection blower--got it from the friendly neighborhood furnace repairman just for asking! Revolving side air gate adjusts the blast from nothing to blow the fire out by lifting the attached arm under the front of the forge.

Jerry, That looks like a serious blower. How many CFM does it produce?

Bibble,
Try here Burden Sales Surplus Center. They have all kinds of blowers and are easy to deal with. I have been doing business with them for several years with no problems.

Phillip in China--I've never checked the specs on the blower. It is the most air adjustable I've seen tho without changing the motor speed. On an oil furnace the fuel is fed at the center of the air gate and there is enough pressure to mist the oil as it injects it into the burner. My fire pot is 5" deep by 8" across and opening the air gate wide open for a couple of minutes will make a hole up thru the fire looking like a jet engine.