I ordered a one-piece mount yesterday from another eBay vendor, this one in Hong Kong. The item number is 160281573229. Initially, I thought it was the same as yours, Tommy, but the picture shows 4 base screws, not 5. It also has 4-screw flat-topped rings like the Accushot 1-piece I own. In fact, it looks like an Accushot but with 4 base screws instead of 3. The blurb on eBay said nothing about stop pins, but I'll keep my fingers crossed.
Did you see the 3-9X32 AO scope and 1-piece mount combo Uniflame has up for sale on eBay? Looks a bit like it may be a low or medium mount and has 4 base screws.