Thegainster, I have one 8 inch sub for the Vista's and one back panel (the entire back panel with the port, power supply and capacitors).
PM me if you are interested.
Also, check out one of my other threads for woofer replacement - I replaced the woofers on my Aeon i's with Dayton Audio and they are very similar sounding to ML woofers imho - cheaper replacement and a bit more bass.