This is a better basis for a Lee Speed sporting type rifle, the one in the UK will cost a small fortune to get it to the US.

http://www.gunbroker.com/Auction/ViewItem.aspx?Item=317793608

The LEC action is better because it doesn't have the provision for the volley sight ,although this particular one is probably a bit to rare to mess with, if you could find one that's already been fooled with that would be the go.

Cheers
Pete