I was just thinking about this the other day, and came across these rack-mount coolers for home amplifiers. You'd have to wire up a power inverter if you don't have a 110V accessory plug, and your amps would need to be mounted a certain way, but I like the looks of it.
AC Infinity AIRCOM T10, Quiet Cooling Blower Fan System 17" Front-Exhaust, for Receivers, Amps, DVR, AV Cabinet Components https://a.co/d/0hmS5tI
AC Infinity AIRCOM T10, Quiet Cooling Blower Fan System 17" Front-Exhaust, for Receivers, Amps, DVR, AV Cabinet Components https://a.co/d/0hmS5tI