J.S.J

I have decided to overhaul my engine, haven't seen a rotary until now. I have asked around a few machine shops and have found a shop who does custom machine work non auto related and they machined my side housings and it was quick and painless. I see there was just a tick under 2k removed. I still haven't decided on the apex seals. I"ll toss out a question;
Comparing apex seals conventional and ceramic which of the two create the most wear on the rotor housings. I under stand the durability issues and see the price difference just fine. As far as vi ton coolant seals again the advantages are clear. Can some one direct me to a site who stocks them?