I recently read where a fella used an Encore scope base. Said the contour was comparable. I’ve yet to check myself but MGM offers their bases in a few different lengths, so I’m thinking a 4” may be the choice to go with to limit the overhang at the front as he mentioned a standard length base did hang out there a bit due to the taper of the barrel.

A buddy just discovered a gunsmith relatively nearby who does custom rifle building, so I may have a candidate to do the D&T for me.