Speedbump,
I saw this link http://www.geocities.com/circlej03/sights.html posted at another site - I have not seen one yet - but it looks like a quality base and is set for irons as well.
Goodluck
PMD
WTS: BSA Contender 3-12x40 Riflescope.
Bought new two years ago and never used.
BSA Model # CT31x40TS. Scope has sunshade and scope covers. $85.00 + shipping