Hi All,
After a second hand JDM turbo Instrument Cluster (Rev 1 - 2), needs to be between 1989 - early 1992, as long as its mechanical speedo not electronic type.
My current on has a doggy trip meter, although the odometer still works & clicks over fine, speedo needle bounces around & the tacko is out by around 800rpm (confirmed on dyno).
 
Let me know if someone has an old one laying around - or even parts.  Located in Adelaide - happy to pay post too.   

Hey Mike,
Is the speedo accurate but just a bit bouncy? If so, mine is the same at low speed, and apparently it's caused by the speedo cable.
As for the tacho, if it's working but just reading the wrong value, then it's probably the 2 capacitors on the little circuit behind the tacho. That happened to mine too, and it was totally fixed by replacing the capacitors shown in the photo below. It only took me about 15-20 minutes.
http://www.mr2.com/forums/attachment.php?attachmentid=28387&d=1377131495
 

Ah... ok, Thanks Rob, yes speedo is accurate, but as you have described bouncy.  I will attempt to repair the tacko though.
Cheers. 

I have a immaculate low kms unit. Email me at soaren1@hotmail.com if interested.