Yes it is a solid little piece, not the best perc, but certainly far from the worst, it is small, which is part of the problem the perc is a bit big for the size of the volume, so with water level etc it's just not ideal imo though it is still the best base for my hydro tubes (older straight style with bent necks by evolver) And it is unique that it has 14 mm female but 18 mm male at the top... Functionally it is not that dissimilar from the Texas Hot Glass sherlock shredder honestly, and hard to argue with the price (yes decent thick quality too from Genesis Glass always)
I don't have any to link you, they're all the same or less it's hard to really know, you can get them from Amazon and eBay too, various other stores that are not expensive, so you don't have to order from DHG... Plenty of US resellers, I actually got really nice whip adapters from someone else who bought them from Oregon glass blower, I'm sure they cost more but never seen any of this nice... Others are hit or miss