Look for a cartridge at say 8 X 10-6 cm/dyne. That is going to be hard to find in a MM cartridge. Soundsmith might make one. Not sure. There are many MC cartridges but you would have to have a step up devise.
I would try the foam damping first and if it works go for a High Output Soundsmith or a Clearaudio MM cartridge. The Grados and Ortofons may be too compliant for your arm. I just had a brilliant Idea! Get a Nagaoka MP500. It is a fabulous cartridge for the money and it has a compliance of 8.5 X 10-6 cm/dyne. Read the reviews! Get that, dampen the springs and save $800:)