Looks nice Jeff, are you saying it is a rover tracks, but that it was modified to use the stock panhard? Can't really tell if it's been ground down or what in the picture. Or is it from somewhere else (if so, where?)
I used the same 'blank' as Rovertracks, but did not get it from them. I Have spoken to Keith (emailed a while back) about how I did it so he may be able to do it for you. The set above was done at Quattro Sports in PDX, while the set on my 100" was done at BCB in Paso Robles.