I know the one you're talkin about, I got one from Thunder Racing (Awesome service, fast delivery!). It's a bit of a pain to use though, especially on the springs near the firewall. Plus, it's made out of aluminum and gets beat up pretty easily. I've heard great things about the Crane valve spring compressor, which Thunder also has.

Both tools are on this page:
http://www.thunderracing.com/catalog...&vid=9&pcid=17

 

Thanks, that was exaclty what I needed