Check these guys out, they have some turbo stuff for cheap listed on their web site. Although they are nissan driven, the turbo timers/BOVs are universal.
Mynismo.com
Look Under the S13/14 pages, or search :Turbo Timers, Blow Off Valve , etc....
the links don't work right now, or i'd link them.
Turbo Timers at $75, 165 for type S BOV, $200 for HKS BOV, etc....