There have been reports that T55 went out of business, but their web site is still up and makes no reference to whether or not they have called it quits.
Doubtful, at least based on what I understand. IE: That they are the plastic division of Overland Brass. And I would expevct that Overland would have to croak in order for them to go.
I figured he would update with something after saw you e-mailed him (I phoned Mr Marsh today to find out what is going on). Sounds like it may be a little bit of a wait, but all good things come in time…