The 496R typically comes with a 500T, and 490R typically comes with the 498T. Just saying, chances of finding them as a set will be slim to none, as they don't typically come as a pair in any Gibson. I think you might be confused.
I'm not confused, I have a Les Paul Axcess Stop Tail which comes with this pair (in black). The overall tone is awesome and I don't wanna change anything tonally but I prefer zebra for the look. I don't wanna necessarily find a set, one after the other from two different guys will be fine too. People usually hate on Gibson stock pickups and constantly change them for Motor City/Arcane/Bareknuckle etc. There must be some stock Gibson pickups lying unused somewhere....