I believe Michael will be contacting you privately. However, is photo accessed via the link where the problem is?

<The problem stems from the brass track system the rear standard rides in. There has been enough wear to allow some wiggle that I would prefer were not there. Here is a photo showing the pieces in question. This is the right side, the left side is simply a mirror image.

http://flic.kr/p/dRg9f8>

These two parts either need to be replaced NOS, recreated altogether, or new brass needs to be brazed on to the existing parts and then milled back to shape.