To support longer stock in the forge, I used to use plastic crates stacked up, which worked, but were bulky and made of plastic didn’t fare well with hot steel. I saw a simple support stand on a video on you tube and thought it should be fairly straightforward to make, and it turned out to be very useful so far.
Here is the build video:
https://www.youtube.com/watch?v=m1qYu8aNCiU&feature=share