Willow,
I have herd very good things about GRS. I think there is a more cost effect way to having a front mount on a focus Rest with a little bit of research between us I think we could get something going.
Maybe it would be worth you having a chat with him I am going to call a few custom fabrication companies and see if they fancy doing some prototyping.
Radtech do some custom coolers as well maybe worth a phone call? If we could get a couple of us together we could come up with a product that could be sold.
Jim