What branch are you in?
You may be able to scrounge alot from the motorpool. Brake drum, pipes, fan motors and batteries for power. You can even use an axel tube from a hum-v for an anvil if nothing better can be found. They are fixing and replacing items all the time.
You may be able to make a reasonable bellows out of sticks and string and old cloth.
This is tough, for me, without a bit more information. If you give us a mental picture of the surroundings, we could offer more insight.