I'm looking to replace rusted out baseboard heater covers (35+ years old). It's a water based system with approx 4" fins. The present covers are approx 9 - 10" tall, 4" deep, have a 1/2" gap at the bottom and a 2" opening at the top front w/ an additional shutter inside to open or close the register.
I'm not sure where to look for this old style of heating system.