Well, I lucked out. I remembered having a mount similar to the one used on these rifles put away with a lot of my other forgotten about firearm bits and pieces.
I didn't have two screw mount holes that lined up so with the aid of a dial caliper and drill press that wasn't a problem.
Also the mount didn't have the exact fit on the bottom as my barrel so some sandpaper and a little lapping fixed that.
It is kind of a god awful looking setup but I really just needed a scope so I can make my reloads for this rifle as accurate as I can as my eyes just aren't up to this task very well at distances of 100 + yards with open sights.
The only rings I had on hand that would work were the very high rings and the only scope I had on hand was a Simmons 6X24X50. I don't know how long the scope will hold up under the recoil of the 45/70 but I hope to find out tomorrow.
I really wanted this setup for tomorrow that is why I wanted the info on other possible sources for the mount. I remember a while back that my Walmart had some of these bases on clearance and if they haven't sold them yet I think I will buy me some for future use if the need arises. Who knows, if I take a liking to a scope being on this rifle I might just get the right rings and a good low power scope for it. Thanks to everyone for their replies.