D*A*M MKII or Gary hurst MKI (which is really a MKII circuit). These are both pretty expensive and the D*A*M is really hard to get. The Sweetsound Probender uses new production oc81's and the clips sound great, and the price is super reasonable so it may be your best all around pick.
Well if a pretty much exact clone isn't what you wanted it probably was over rated. As far as overpriced, the second hand market is very ridiculous for these, but if you buy through a dealer it's a pretty fair price.
I have a D*A*M*,a Throbak Stonebender,and built my own using the BOYC kit.D*A*M* is the smoothest most exact clone of the three,Throbak is excellent very versitile.BOYC is also good, was fun to build,has OC 75,s.If you don,t want spend alot of money the BYOC is a great way to go,and if you not confident is building one they come pre built.Throbak is not cheap but made very well and well thought out,I bought mine on the page,used.Well worth the money.You see them pop up once in while.Is my favorite for tweekabilty.Is that a word? I love FUZZ,S and have many. MKII are among my favorites..Hope this give,s you some Idea,s. JHX