i guess if heat isnt an issue they should be ok, but i recon will look pretty grubby after a bit. foamex tends to hold dirt in its grain… which i thought would be an issue in a food place.
im guessing your talking 10mm foamex? anything thinner would look a bit… well… loose if thats how to discribe it 😕
if 10mm foamex and the box isnt that big ide imagine they would be easily made in house. just cut sections to size, glue, fix in some geartrays and bulbs. perspex face and some L-shaped angle to hold it in place. job done…