When were they purchased? If they are 853 comps, I can get you a pair NEW. If they are the new comp 6853 I cannot get them, they are a copy of the 853. I also can get the 885 lifters. The 853 uses a flat c-clip with ears for removal. The 885 uses a flat c-clip with ears for removal and tangs pushing on the seat. Early 885's have a round c-clip with no ears for removal.
If interested, it takes about a week to build them and ship. Contact me via phone