This might help....
http://www.shop.com/Bosch_Colt_8482_Variable_Speed_Palm_Router_Kit_-31957313-52352078-p!.shtml
Scroll down towards the bottom. I think it says it is 15.00 don't know where else it can be gotten.
This one is a set but includes and adapter for the PC guides.
http://www.amazon.com/Bosch-RA1125-7.../dp/B000063XTX
The item you need in particular is RA 1100
http://www.amazon.com/gp/product/B00...260783-8173402
Corey