I have a trane heat pump model # TWD730/TWH030 OLD I KNOW.. but it works perfrect. My issue is the condensate drain pans are totally rusted out. Now that I have to replace my ceiling, I have total access to the pans. Where do I find replacement pans?

Tryt Trane first but if they are no longer stocked and sheet metal man can knock one out. You could also try spraying liquid rubber sealant sld on TV, Home Depot and at Menards. Rubber Coating Spray | The Home Depot - Model#: 11203-6