Sorry. This is about the rounder model TBD- 36
The only rounder I can find with that model number is TDR-36.
Are you certain it's TBD-36? TBD are all sheeters and their model numbers are 500, 600, and the like
If you are talking about the main power switch, then the housing is actually part of the switch and you'd have to purchase a new one
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