Racing Beat has been at it since day one with a Superior reputation. I just saw this for side housings repair and I could ask them and show them some RE5 side housings for an estimate if any interest. Link here.... In Southern California.
Not sure how they'd go with our moly coating... might be worth asking the question if anyone was in dire need. Another option is to get them resprayed with moly then surface ground/lapped as per the norton rotary engines in the UK. Not sure who could do that though...
That seems to be the common failure for ours- moly eroding out of the pattern grooves. My 80,000km motor was fine with virtually no corner seal wear that the Mazdas get on the side housings at 3 and 9 o'clock.
Perth, Western Oz 1975 RE5M x 2 02 Beemer R1100S mature conveyance Some dirt bikes for fun! Wish list: Just about everything in Jay Leno's garage