I don't see any listed on either of those two sites, but you could place WTB ads. There are also the 6 miata forums that I check regularly for parts ;)
Installed a polished K&N Typhoon intake on Saturday. Cool throaty sound under load in 2nd gear and up, not much of a difference under normal acceleration or at idle. I think the exhaust note from the Borla duals may have also gotten a little louder.
Throttle response always seemed quick on...
Installed a Cobalt 3-point STB over the weekend. Vastly superior to the OE brace. The front end feels a lot tighter, less distraction on mid-turn bumps.
Weekend before that I installed an OE rear lip spoiler. Guess I haven't posted here lately!