From what I've seen so far, aftermarket options are either expensive with decent shipping, or reasonable cost but crazy shipping. I'm ready to pull the trigger on Endless SSM Plus pads from Japan if for nothing else to cut down on the dust. Clean the wheels and one drive later it's hard to tell.
Endless SSM + from Blackhawk Japan
At least with Blackhawk I can add the cooling plate I want and save on shipping. But the same pads from a local vendor are like $500-600. Limit +1 local vendor