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Often times the maker and model are molded into the ABS, usually near the outlet. If that’s not there then measure width,length, and height. Note where the outlet is and you can order a replacement.
Trekwood might carry the OEM but with the age of your unit may not.
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2012 Copper Canyon 273FWRET being towed by a 1994 Ford F350 CC,LB,Dually diesel.
Airlift 5000 bags, Prodigy brake control, 5 gauges on the pillar.Used to tow a '97 Jayco 323RKS.
Now an RVIA registered tech. Retired from Law enforcement in 2008 after 25+ yrs.