Transmission question
 

I have posted various questions before...bit hard to know what year i'm dealing with as it is a kit car using an RX7 12A engine

Have determined that the engine is '84/'85 ... has the larger clutch and carburated...

It came with a 4 speed and I have replaced it with a five speed. (year unkown also).. when mounting the shifter we found broken upper and lower nylon bushings...
I checked the web and found that '81 to '91 shifters were the same (?)...brought up the specs at local Mazda dealer and it showed 1 nylon bushing... my five speed had an upper and lower....can't seem to find the parts at the dealer...they all just showed the one.
The transmission has the large 'vent' on the side so assume it is '84/'85?
Anyone happen to know the part number for the lower bushing? We made do with just the upper and it shifts fine, but would like to add the missing part.