In another thread it was determined, correctly, that I had one of the defective dip tubes in my 1997 Bradford White 80 gallon electric water heater (model number MI80R5DS13).

I'm trying to stretch out the life of this a little longer. It's in great shape except for this problem.

However, calls to all six of the major local plumbing supply stores in my area (including 3 Bradford White dealers) have resulted in no part. Each of them says I'm unlikely to find it in stock.

Does anyone know a good source where I can find the right dip tube that won't be of the same material for this unit?