I'm selling my Cobra Nogaro seats complete with OEM Sliders/BK Mounts and substrap mount. These are ready to drop in to your E9x. This will save you a ton of time buying all the parts and having to disassemble your existing seats. I'll take a $100 off if you do not want the substrap mounts.
Photos:
https://photos.app.goo.gl/Kn3E6eNAyADWJpRdA