For Sale is this Geniune Mazdaspeed Short Shift Kit, (Optional factory race parts from Japan), Mazdaspeed Part Number QEP5-17-510 from the 97~98 Mazdaspeed Parts catalog
Fits NA6/8 NA Miatas 1990 thru 1997
Comes with all the hardware and even the factory Mazdaspeed box! Uber rare to find these days.
This is quite possibly the best short shift kit available.
Last one I saw in used condition sold for $450, im asking $349 shipped in the USA for mine.
Mazdaspeed NA miata Short Shift kit by Randy George, on Flickr