I have exactly what you have described. I just pulled the action and built a 6BR on the action. The stock was originally on a 243 cal. It is in excellent shape and should be very easily prepped for the paint job you described. Action Screws included.
I have no use for it now so you may have it for 25.00 plus actual shipping charges.
Don't let my lack of posts discourage you. I have perfect ebay feedback as tnerb5g3g and perfect feedback on Gun Broker as well.
I also have a short action SPS Varmint Rem 700 BDL That has been painted in a olive hammertone color w/2 coats of clear. I have opened the barrel channel to accept a light varmint contour barrel. I have reinforced the channel with epoxy about 2 inches passed the recoil lug. This stock has also been stainless pillar bedded. All it needs is a good action bedded to it and it's ready to go. It has two sling studs on forearm and one on the rear.
You may have it for 60.00 plus actual shipping.
I also have two more of the black synthetic remington factory sporter contour stocks for sale. They are both Long Action R/H stocks black in color and are in very good condition as well. Same price as the one above if anyone wants them.
Thanks for looking.