Very glad to find that Express Ramps carried this parts-kit.
It has everything I needed to change the configuration of my existing ramp.

It arrived relatively quickly, and was packaged well.
There was a light problem with one of the studs being out of spec (0.41 mm to be exact) and the customer service crew (Eric & Heather) were very responsive and maintained my confidence in this company.

As future needs arise, I will do business with ExpressRamps.com