Zwego:
I spent much of last year trying to find a platform to build a SxS sporting gun. I found a Fox A Grade with 30" perfect bbls, and modern stock dimensions in terrific shape. With a period Silver's Pad, the LOP = 15", with DOC = 1 1/2 and D@H = 2 3/8. It has some cast-off, I can't recall the heel and toe measurements. At roughly 7 1/2 lbs it's heavy enough to attenuate recoil. The chambers were lengthened to accomodate modern 2 3/4" shells and I had Briley steel screw-in chokes installed. The guns is sound, strong and dependable. It does have double triggers, but even if you had Turnbull install a Miller single trigger you would still be well within or below your target cost. If you would like to talk more about the gun, please contact me at tkline@mhcable.com.
