Talley sells rings for the Predators. Alternately 2 Remington 700 front bases would work, but why spend the money for 2 sets when Talley makes them in one. Sorry, I don't know the product number off the top of my head. A call to Talley will solve your query.
Lightweight lows will be a good fit, assuming you have a stock that doesn't have a high comb. You won't need an extended base for a 3.5-10x40 on a long action. The scope has good tube length and eye relief.
I have a Leupold VX-3 3.5-10x40 on a Stiller Predator with a Brux #3. I have Leupold Dual Dovetail lows on the receiver and have no problem with clearance. Mine is a 6BR though, a short action.
