Stripped Jumped Timing Belt

[nailhead432]

Do you have the specs and torque sequence available to you to install the cams? Its not wise to just unbolt them in any order. Just use the reverse proceedure to remove the cams as you would to install them. Clear as mud? Basically, loosen the outer most caps first, alternating back and forth. And don't just unscrew the bolts all the way, do it in stages throughout the entire process. This would be similar to unbolting the head. This is the "proper" way to do it, and the theory is that by doing this, the cam will lift up evenly against the cam journals and prevent gouging.
Now personally, I've used a 3/8" impact gun and just hit each bolt (still going back and forth from one end to the other) and have never had a problem. Then again, I'm willing to suffer the consequences if something were to happen (only on my car though, never a customer's). Takes less than 10 seconds and I'll have the cam laying on my tool box (in a clean, safe place).
I didn't get a chance to look at your tool that you posted a hyperlink up to inorder to replace the valve springs, but I will tell you that Snapon wants $150 for it (made in China, @#%#@, but thats another story), so $85 doesn't sound too bad if it will do the job. I think the valve springs from Toyota list for like $5 or $6 each, not bad if you only need one or two.
My Supra happens to have a lot of blow-by and really isn't worth fixing (that engine), but I might still pull it apart for the hell of it just to see what caused it to break. Might also be noteworthy to get your hands on a boreascope and make sure that the piston or the valve has not suffered too badly with the broken spring.
Good luck on that one, keep everyone posted on your adventure. I'm sure the pics are helping out a lot of ppl that are reading your threads, keep it up.