I had one of those models a few years back, if anything, better finished than the new stuff. Very reliable, but not 'politically correct' because there was no completely safe way to lower the hammer without first unloading the gun. Other than that they work just as well as the new decockers.
For magazines the best I have found are factory Taurus, Meggars, and Pachmayrs. I have read that Meggar made the magazines for Taurus. They are all 15 rounders. I have some RamLines that are 17 rounders, they are of thinner construction but seem to work as well. Stay away from USA and all the other crap. Any Taurus 92-99 mag will work in the older guns, many parts will interchange as will some Beretta parts. The old guns do not use the same grips as the newer decockers, however.
Incidentally the gun may still be covered by Taurus's lifetime warranty should you have a problem.