Looks like Kokopelli may be hanging it up. I don't know anything about the quality of the molds, but people have asked about where to get XI body panels. This might be a way to make your own...
http://www.ebay.com/itm/Replica-Kit-Mak ... ars_TrucksBTW, I found the reason my 3rd gear synchro wasn't working on my Thunderbird T-5. When I had the trans rebuilt, thee replaced the T-bird input shaft with a Mustang shaft, Unless you update the synchro to the Mustang one, there is ~ 1/8" gap between the shaft and the cone of the synchro, rendering it useless.
Regards,
Mark, builder of "Invincible II(a?)"