Based upon a different comment, ordered closed cell ultra soft foam from McMaster-Carr (P/N 93725K132). The result stands proud of the printed part but in non-adhesive foam 1/8" thickness, the smallest width is 1/2". In theory one could slit the foam, but it is unlikely to be worth the trouble. The A-Premium cabin air filter (P/N CF11766-C) fit perfectly without trimming. In testing the airflow through the filter, at least initially, does not negatively effect the Studio's temperature.

The model is a great fit for the Mac Studio and an easily available car air filter. The finished piece looks almost like part of the computer. I appreciate the close attention to detail and good fit of the individual parts. The top of the main piece has a channel that fits a strip of 1/2" by 1/8" closed-cell foam stripping I got on McMaster. That makes a nice seal with the computer resting its weight on the foam. The model fits a square A-Premium auto cabin air filter CAF11766-C (I trimmed the corners slightly). I had the piece printed by a vendor on Craftcloud, using silver PLA with 100% infill and sanded. Not cheap -- US$80 for printing and shipping from China -- but nicely done and arrived in a couple weeks. The silver PLA is a little bluer than the Mac Studio but looks quite nice, silver with silver, with a thin margin of the black foam showing in-between the stand and the mac.

Fantastic design! I got a friend to print it in timber fibre infused PLA, and the result is a classy look with the Mac Studio on top.

Excellent casing. Everything fits perfectly; an elegant solution.

Model design is simple and effective, dimensions are accurate. Seller answered my questions quickly. I'd have no hesitation in recommending this.