DRIP PAN........some are separate trays.......some are just part of the unit pan.
On the Brisk I think it's part of pan, which is not a service part.
I would just use some JB Weld on crack and seal it.
Here is a Service Part Guide........click on your Brisk and then on model for parts.
LINKLike I said....JB Weld the crack.
No need for new unit.........unless the A/C Unit is junk