I took a few moments and made a photo set of the old bracket I made ten
years ago:  http://www.westyventures.com/rigs.html   Scroll most of the way
down the page for detailed photos. Easily made from common hardware store
items and iron pipe. Minor welding involved, although there may be other
ways to make it stable. In my version, I used an original Westy table knob
to secure the table, and a tiny flat plate strategically welded to stabilize
the bracket and prevent turning in the jack point hole. The 1/4" bent steel
pin locks it in place in seconds.

Karl