It's been out of production a long time, Daric, so parts are going to be iffy. There is a company the specializes in old gun parts. It used to be called Numrich Arms, then it became Gun Parts Corp, then it became Numrich again; I think it is still Numrich, but I'm not sure. Some Googling should find out.
Otherwise, I only have two things to suggest:
Check the gun auction websites regularly. There are only 2-3 big ones, and a Google search will find them easily. (We're not allowed to name them here - long story.)
FN-Browning in Belgium made the same gun for many, many years. I doubt parts are drop-in interchangeable (Belgium is metric and we're not, for one thing) but you might talk to a gunsmith and see if he could do anything with a Browning barrel. You might also want to research that on the internet first, but you need a gunsmith who is willing to tackle it.
(Savage made this same design too, but they seem to be scarcer than the Remingtons.)