HELP! Road Runner in prison, or any garage door repair guys out there?

First question, do you know what brand your door is? Usually there is a tag or a decal of some sort. If you can identify it, get hold of the vendor and ask for a parts list. If you can't identify it, start going by comparison, most of the hardware is pretty universal. As to installation, if you have an 8' x 10' or smaller, you can do it your self but you HAVE to have the proper winding bars and you HAVE to follow the procedure exactly. I've installed a number of smaller torsion spring doors using a ladder with no problems. I installed a 10' x 10' once and used a manlift, no ladder for that one.

If you can't identify the vendor but you can get the springs, the biggest problem you'll have is how much each spring is to be wound. This is something that is better done correctly the first time. One door I did I didn't wind it enough and you could barely open it. Another I wound too much and the door flew open like a rocket ship. But having a plan and working carefully, you can get it done.

As a last resort, buy a new door with the easy wind springs like Daves69 mentioned. There's always more than one way to get to Rome.