Looking for a material so I can make ABS parts with rubber grips and feet
Ninjaflex dual-extrudes great with ABS. I've done a fair amount of NF/ABS dualstrusion. Frankly, any TPU will probably work, since molten polyurethane sticks to practically anything. 

The main challenge is ooze control since TPUs tend to ooze a lot. You're going to want to use a printing temp on the low end of the range for the flexible filament, and use some sort of wiper wall structure. 

Another issue you might run into is re-priming the flexible filament after an extended idle time. It helps to use a large purge structure to ensure the nozzle gets re-primed fully. Don't use an excessively large toolchange retraction distance -- this will make it more likely that the flexible filament jams during reprime. 

The best way to accomplish the above will depend on your slicer. Simplify3D is a good choice since it has good dualstrusion wiper and purge functions. Other slicers can be made to work as well.