I think I found the "Guide Support" on Tischer's web page. They call it the Strut Mount and the cost is $100.42 ea. I am not sure it's the same thing but it's an educated guess based on the picture shown in the link below (part number 16).
http://www.trademotion.com/partlocat...16&catalogid=1
This is timely because I just ordered RD Sport springs. I may try and mimick Dinan's system.