I would say AngelCigs, but I was going to recommend a kayfun clone lol
AngelCigs has some affordable clones, but be warned not all of them are of great quality. The ERL 1:1 clone is good, though you need to really know how to build/wick it or it will be nothing but problems. The russian v2 is horrid due to the afc. The AC-R is horrible in my opinion, but apparently I got a defective one so they are sending me another as a replacement.
Still, can't go wrong with a Kayfun 3.1 ES. I haven't tried the Kayfun 4 clone, but I plan to very soon. They also carry the Orchid v3, v3.5, v4, v5, and v6 if im not mistaken (maybe not v5)