Weaver 93 is the hole spacing for any mount. It's how benelli shotguns, Remington 7600/7400 rifles and many others are spaced. There are about a million different picatinny and weaver bases that will fit that hole spacing. Believe they all have 8x40 screws too
That's a good way to go. If you want it mounted lower to the receiver (which I would), a Sumtoy base will work and be a lot sleeker option and will give you a lower mounted optic and a better cheek weld