There is always this one Bill. I got a couple of sets in for a friend here and they are a nicely made sight. Not the classic Lee Speed fixed with 3 folding + ladder but will look good on your barrel.

BRITISH “WHITWORTH” STYLE EXPRESS REAR SIGHTS

http://www.e-sarcoinc.com/mk10msr1fixed2foldinglearoundbottomvesexpresssight.aspx