Anyone that has a "water jet" cutting machine can make you an exact duplicate.
Not sure what is available in Mexico
, but there are several companies in the US that have them for making custom windshields for cars, etc as well as general production cutting.
Tolerances when cutting with a water
jet are extremely close (in the .005" range I believe). I have had all sorts of material cut with one - safety
glass, stainless steel
- so plexiglass won't be a problem.
I think there is a company back East that overhauls Lewmar
hatches and has replacement "glass" available. Their prices seem a little high to me, but they have them as more or less an "off the shelf" item.