Paul,  I just ran across some 4 rotor Mazda engines being sold Three at
 one
  place and one complete except for exhaust header for 15,000 from
  www.racingjunk.com in orlando florida.  They have a needle bearing added
  to the two original center housings which usually don't have a bearing and
 a
  custom center housing. I was doing a search on adding a third e-shaft
  bearing and found the engines.



Paul, I wassearching on yahoo for "4 rotor eccentric shaft." There is a
company  KIWI-RE that sells a kit for $9,800 which includes the shafts, two
converted to bearings center housings, tension bolts etc and several places
linked to their site gave the details.
     On the fourth page of "4 rotor eccentric shaft" search the fourth entry
down WWW.racingjunk.com <http://www.racingjunk.com/: I went to the site and
the header address was        http//www.racing
junk.com/Category/93/Engines_Components/post/1934233/MAZDA-RX7-4-Rotor-R26B[AS-SEEN-ON-H.T.N.html
I also saw an add for someone else in Florida who sells the assembled blocks
without accessories also for  $15,000 but didn't save the address. The all
seem based om the same conversion kit.   Along similar lines Atkins Rotary
is selling single rotor e-shafts and counterweights with along with Jeffs
side housings would make up an engine block. They may also still sell single
rotor oil pans. I am still going to use two RX-8 eshafts but  was curious
what the third bearing e-shafts looked like.
    I will attach a picture from the jacing junk site.

george grimes