You could look through sold items for one, and email the artist saying you want something just like it. I guess you could get screwed as it wouldn't be an official etsy transaction but I really doubt that they would do that.
i feel like the artists who made the sherlock arms would still be allowed to have those up since they dont have a carb or bowl and isnt a pipe. i dont remember all the criteria for paraphernalia (theres been threads on it here somewhere that have them) but i feel like they should still be up. also, considering the link willistokin posted..
my lhs im sure most artists on etsy would be able/willing to make one if theyre not listed. im not sure if alt has them or not
^unless you have a torch, some glass tubing, and a glass joint, no you won't be able to make one. They're only 15-30$