There's many different risers available on Printables and other similar sites, designed to raise the AMS and allow removal of the glass when printing with certain materials.

I was looking for something which wouldn't take as long to print, so I designed these corner sections. When installed, they lift the glass enough to allow a 7-10mm gap, while retaining a lip for the glass to sit in. The corners have been removed to allow 1 piece to be used with all 4 corners - i.e. the square corners on the glass will be outside the bounds of this model.

It won't provide as much ventilation as a full scale riser, but it also doesn't take long to print (typically less than 1 hour for 4 pieces). I've included the Autodesk Fusion project file in case you want to make a taller version or any other adjustments.

I printed mine in TPU (to reduce risk of chipping or breaking under weight), but these should be printable in any material. This print has been designed to not need supports, brims, or other assistive options.