Try this site...
This is the tech-page;
http://www.gerlecreek.com/documents/tptechnical.htm
This is the classifieds;
http://www.gerlecreek.com/documents/tpclassifieds.htm
At least one listing showing about $1100.
I bought my linkage, and fuel log here - also bought this guys tri-power bulletin which goes into a lot of detail in how to set'em up correctly.
I worked with Joe Bunetic (listed about 5-10 ad's down the page... good guy.
- Dan