I would guess the large yellow one (Dewalt?) in the metal shop needs one as well. The Tormach has a dedicated vacuum, Larry probably would know if a filter is due.
Also, once again the metal shop's crevice tool for the large vacuum is MIA, so maybe grab one. I get them for the metal shop occasionally, and engrave "MMS Metal Shop" on them, but tend to drift away somewhere (why I keep a personal one with my tools so I know I have it when I need it to clean things like T-Slots in mills).