Dixie Gun Works sells Quic-kee removable scope mounts for 1 inch and 15/16th inch barrels with no drilling or tapping necessary. I'll bet thatit's a higher mountthan a simpleWeaver base, but the advantage is that it's only temporary.

For 1 inch barrels:

http://www.dixiegunworks.com/product_info.php?products_id=7613

For 15/16th barrels:

http://www.dixiegunworks.com/product_info.php?products_id=7612