Many stories like this one Danny and I can sympathize with you.
I have bought several Corbins for various bikes over the years.
This year in Daytona (March) I ordered an off the shelf Corbin leather seat for my 2012 25-0 Ninja.
I had no problems with it arriving when they said it would and the fit was good and the workmanship was good. The leather was nice and the new stitching they use is much better if the seat gets caught in rain.
If I was you I'd call in and ask for Mike Corbin the owner. He usually is around.
If they don't deliver or respond within a short period I would put the purchase in "contest" with my credit card company. They will with hold or get back the payment until the matter is resolved fairly. Wardie
PS I'm selling my Corbin
sold my bike