I need to ship my Cutlass, but I don't have a case.

It seems like my best bet to ship a guitar is to ship it inside a hard case. When I bought my Cutlass the store didn’t have a case on hand so they gave me a discount and I’ve been a happy camper ever since. Now I need to ship the guitar and it seems that the case can no longer be purchased. Does anyone know if there is a good “drop in replacement” for a hard shell case, or if there is some other way I might be able to ship the guitar safely?