There are lots of 36mm Exp 1 reviews over on RWI and Repgeek. This discussion has been covered many times before. Overall, Angus probably has the best one if you can get it from him. He had it in stock last year but then quickly went back out of stock. It is the ETA 2824 version, so the crown stem height is correct. Some are too low on the case. Dial, hands, and everything else are dead ringers for gen. The big detail is the crown itself, and over on RG a member who sells gen Rolex crowns and parts bought one last year. He reviewed it and said the crown was indistinguishable from the gen Explorer crown he had for sale. It was that good.
I already have a 36mm Explorer from Josh at Perfect Clones, but if it ever dies I'm replacing it with the one from Angus (Puretime). Either that or I'll build a vintage 1016.
Some other members on RWI have had MarvelousReplica source them a 36mm. That one is also very good.