dk3ball

I just purchased a SBE 3 Rifled Barrel 12 Gauge Slug gun and want to put a scope on it but am having a hard time figuring out what scope base to use. I see Benelli makes a Picatinny Rail Kit style base which I would buy but is sold out. I've checked some of the other major brands sites and can't seem to find anything (Weaver, Warne, Leupold, etc). Anyone else run into this issue??