Somehow the foot to the sander disappeared.
Step 1: Get Sugru
For the repair I used two packets of Sugru, make sure you cut three sides of the package as indicated.
After removing from the packages kneed then for a few minutes as directed on the package.
Step 2: Start Molding
Put the Sugru through the hole and start molding to the size you want.
Use a combination square to measure the height needed for the foot. Then use it to flatten the bottom of the shape you made.
Step 3: Finish Molding
Finalize the shape of the new foot. then let sit a while. I left the sander on its side for a couple days.