I can't wait till a boat company ditches the turn latches, they are terrible. What needs to be there is a 'button release" type spring latch, and only one of them.
I found this little magnetic one, looks like it would work well. its expensive though, $24 for the keyless one.
http://www.hardwaresource.com/hinges/GA ... Pull+ModelIf you find a simpler one, with a finger-slide/button release let me know. I will be replacing mine this winter. Also, if the holes do not match up, its okay, there is a 1/2" or so of space between the edge of the frame and where the glass starts, so you can drill your own holes.