PS. The only other conceivable option (I think Brian mentioned it) is to cut the rim off the isolators so they'll sit flat on the floor of the Indian arm cups. Actually doing this however will be much harder than it sounds. They're made from extremely tough rubber and the cut line is circular.
The line would be through an arc roughly where the bottom edge of the part number is here (RKB101290).
These things are NLA so there'd only be one chance to get it right.