djohns and Ron,
P.O. Ackley does mainly rebarreling of actions, but I wanted to add that his shop does do stock work as well. In many of the Gun Digest of the 60's and 70's have a section devoted to custom guns. I have ran across several "complete" builds of rifles pictured in these custom gun pictures.
Not long ago I ran into a post here on the internet that suggest he is still very much in business, although he has to be getting up there in years.....
Like Ron said $1000 would be a minimum with the solid floor FN action....got to be hard to come by....maybe $1,500 if it has some serious "eye appeal"...less sights of course.
Any chance you could post some pictures?