Just modified the links to point to correct place.
This is how I mounted my standard bike rack for a 2" receiver to the four inch bumper of my 1999 Trailmanor 2619.
Camping World sells a 2" RV Bumper Adapter catalog number 17221 which sells for $29.99. This adapter is made by Swagman.
The complete details can be found on my webpage at:
http://home.attbi.com/~trailmanor/ under TM Modifications.