Let's see.
I would call Allen for the TransGo and Corvette servo. I think he is charging around 130...which is pretty good price.
As far as the the Billet OD Servo, I would check on Ebay. I see those things on there all the time.
And the Hardened Seperator Plate, check with Jag Performance.
FOR ALL YOUR WHEEL, TIRE, AND ACCESSORY NEEDS
CONTACT: EPLEY'S TOUCH OF CLASSIC 1-270-843-6892
OR TO GET ME PERSONALLY CALL: 1-615-943-6514
2000 Chevy Silverado 4.8L RCSB: smoked UPD, Flowmaster exhaust, De-screened MAF, Nelson 93 hot tune. Upcoming installs: trans-go shift kit, Eaton posi, billet servo, ported and polished throttle body...Near future: 6.0/4L80E install with 150 wet shot