BTW -- If you need to replace the glass, you want auto safety glass. It usually takes effort to find a glass shop that works with safety glass. (I have an established business relationship with two shop for this reason.)
Once you find a shop willing and able to cut the glass, they will need the aluminum frame to use to mark and cut the glass to size and shape.
Avoid the temptation to use plastic sheet -- it's easier to work with but rarely lasts very long. (UV deterioration and road debris usually renders it unsightly.) There are products for restoring plastic appearance. The ones I use were originally developed for cleaning the lexan windshields in fighter jets, back around the time of the Korean and Vietnam wars.
