Also a note to N00blet, I am guessing that you refer to Stephen Ponte when stating "the main guy who [built] them left the company." Just wanted to point out that TC Sounds has been in business for well over a decade and that Stephen Ponte only worked with them for about a year. He admittedly did make a much better effort at getting the TC name proliferated on the internet, however Thilo Stompler is the "main guy" behind the engineering for most TC sourced woofers, and he will have all the necessary information to recreate any woofer that has been manufactured at the TC Sounds facility in the recent past. But don't think it is easy to get just any custom woofer made, as not all parts are kept in inventory and small scale production is not TC's forte.
Just an FYI.