I'm kind of getting away from 2wd SCT, but if I were club racing/backyard brawling, and wanting a kit... PR Racing SC201 kit.
Living on the edge parts support? Really only one place to order from, and probably why everyone skips over the brand.
At the moment:
SCT410 2.0 is $413.39 (shipped)...
Team Associated should have came out with a Pro2 SC10 kit, but they left the ball drop.
If everyone else is running 2wd SCTs...
Build up a new Pro2 SC10 slider that can be found on eBay. Upgrade as you go.