Crawspace Vent Grate

One of the 50+ year old vent grates on my home broke. I put up a cheap metal cover from home depot after a while, but apparently a raccoon moved in because it didn't last a day. While I let a one-way raccoon door do its job, I am printing this grate out of PETG in the style of the existing vents.

Designed to fit a 14 1/4" by 5 1/2" opening. Print two and interlock them. Probably requires a 220mm bed.