The "nice lady" that spoke to me assured me that they no longer make those kind of sights. Found a few on Ebay but none for my GP100. Dang it man, I guess I'm still old school but I really liked them.
Nice lady? What was "nice" about the vendor (in essence) telling you you don't need what you want!? (is how I sometimes view it!
)
I didn't use that rear sight myself, but have seen them often.
Keep looking on eBay!
Even setting up a 'directed search' that will keep vigil 24/7.
When you go into eBay, look for what you want (in Sporting Goods of course), and
then SAVE the search! "My eBay" will prompt you with a mssg when anything resembling your item gets listed.
I've been almost 100% successful shopping on eBay this way. Sometimes it takes a while, but if you have the patience ...... maybe good things will follow?