Anti-aliasing filter with a higher corner-frequency (>10 MHz)
Usually for an RF application like that you would just design a LC filter network having whatever corner frequency and stop band you decided you need. 

Plenty of software to do this, or hit the "Handbook of filter synthesis", remember to consider the finite Q of real components and the parasitic C of the inductors, but something like 5th order at 40MHz or so 0.5db ripple Chebyshev should be in the zone I would have thought, and should be buildable with C0G caps and SMT RF inductors.