I have a pair of old style Protec trombone cases. One Black, one Blue. They are in good used condition. Both have a little trouble getting the zipper around the bottom corner, but some fresh wax really helps.

These are heavy cases, not like the foam only lightweight case. They are lighter than my bach coffin case, but still heavy.

I'm thinking $99 each plus $25 shipping to the lower 48.

(for reference, that is a 42b in the black case- either will hold it fine)