I think most people here, myself included, were on TZD's mailing list. TZD was the THE source for sealed Turbo stuff for almost 15 years.
A fly-by-night operation by the name of "Redfrog" bought all of TZD's remaining inventory (as well as tzd.com) when TZD closed its doors in December '07. Redfrog turned out to be some sort of eBay store that utilized some questionable practices, not the least of which was turning tzd.com into a storefront for themselves and selling games and accessories for current-gen consoles alongside the remaining Turbo stock. In many cases prices on the new Turbo goods were jacked up to be more inline with current eBay Buy It Now pricing.
Not surprisingly, Redfrog stopped responding to emails within months of acquiring tzd.com, and dropped off the face of the Earth along with whatever remaining Turbo stock they still had. In reality, there couldn't have been a more pathetic end to the Turbo Zone Direct legacy.
There's a huge thread buried somewhere here on the forums detailing the whole fiasco.