Hotpoint fridge freezer, for parts? (Dalston E8)

Hotpoint FFP187B tall fridge-freezer.
Refrigerator door gasket is new last year. Fridge drawers and door compartments are in good condition; top two shelves are in good condition.
Freezer isn't as cold as it should be. It might work okay with a new door gasket, but two of the four freezer drawers are in poor condition, and the tracks moulded into the sides of the freezer are beginning to crumble.
The cooling mechanism might be fine, but like the good drawers and shelves, might do better in a sounder casing.