I've got a set used of EVO VIII/IX lifters from the classifieds on EvolutionM.net, switching to solid lifters appears to be a common modification among EVOs so every now and then a used set will pop out for cheap. You would be obviously taking a risk, who knows what the real reason for updating them was in the first place, so the usual precautions are to be taken (check the seller feedback, ask proper questions etc.), but they can be found cheap. I did clean them as per the several youtube videos on the subject you can find out there and installed them, the ticking was gone for good.
Leo, AKA italian DSMer in constant distress