Unfortunately, the company "Catana" that built her boat is not the same company "Catana" that is operating now.
Have you considered just bonding on a solid (non-opening) piece of
safety glass and keeping one of those automobile window-breaking hammers inside next to it? That is how several new catamarans are being done now.
If you are concerned about getting back inside from the outside, then also mount a hammer somewhere on the stern, although I imagine the bridgedeck
saloon would be pretty much sunk and uninhabitable should the boat
capsize.
Or just glass it over. The chances that a bridgedeck hatch will be useful for retreat in a
capsize are very slim. You will be swimming for it in the bridgedeck, and the open
saloon door will be a better bet for escape.
Mark