I cracked one of mine by dropping the dinghy on it. I’ve just done a duct tape job on it for the mo to stop it leaking, while I work out what to do.
The new hatches are silly money (about £400), but I’m not sure how viable it would be to replace the actylic. I suspect that you’d have to replace the seal at the same time, and that there’ll almost certainly be a screw that won’t undo or sheers off.
I’d be interested to hear what you decide to do, and if you replace the acrylic, where you get it from and how easy it was to do.
Sorry I can’t be of more help.
Bob