never put the aluminum shelves on the front of a 1300, just in the back. There have been people who have sourced some similar aluminum extrusions, but missing the bend that causes the face of the doors to slope out.
It would be necessary to salvage the aluminum from a 4500, or the back aluminum from another 1300 to get the same shelves at the front of a 1300.
I have considered trying to make a fibreglass modification on the regular fibreglass 1300 shelves. Basically just a flat front that has doors. The front would be constructed of flat fibreglass sheet.