Lik2;
I have the Simmons 2.5x Intermediate Eye Relief shotgun scope in .45-70, .44mag Handirifles and a Savage 24P, .22rf over 20ga.
On all 3 they mount far enough forward the hammer extension is not needed.
CDNN Sports has the scope for $20, rings for under $5 and Midway has a Weaver rail for Handirifles, #82,about $7.
You do need to cut another slot in the mount rail, but that is a 5 minute job with a hacksaw and file.