Yeah, I saw that ad a couple of times. My recommendation is to pick up another finder somewhere, either by itself or as part of a set with a beater lens, and just use the new finder. Alternatively, you could buy one of the CV finders which are very nice. The lens in that set is a keeper so it could still be worth your while to go to all this trouble if you don't pay too much for this kit. Check Meleica's site for prices, in case you haven't already. Good luck.
-Randy