I'm very sorry about this as well. I thought his Guynemer figure was excellent, a superb rendering of a specific individual.
I only discovered Manta's demise recently, when I decided I wanted his French pilot, with the cork hatted head.
In case anyone's interested, I found them and received prompt service from
http://tonyshop.fr/ This was only the other day, but don't shoot me if their stock has now gone...
Mark