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.