The best all around lock I've found and managed to fit is the R.E Davis Late English also called Late Ketland. It's the one with the square tail. I remember making this lockplate as small as possible, taking off any metal that wasn't necessary from the top, front and back of the plate so I wouldn't have to take so much wood off the Pedersoli lock panel as to make it look funny. I drilled and tapped it for the Pedersoli lock screws also. The pan I believe didn't line up absolutely perfect, but plenty good enough, and I deepened it and enlarged it a little on one side with a Dremel grinding bit. It definitely takes work, but it looks and functions great. Checked out the Small Siler but found that it would take more work to fit. By the way you could also install a bolster and nipple to make a great capper.