I believe that for an out-of-production model they would either replace it with the next closest thing or issue you a shop credit for the original price of the model in question. <img src="/ubbthreads/images/graemlins/cool.gif" alt="" />
That makes sense, unless there is a vast Busse-kin warehouse somewhere that stores a great cache of all the production knives ever produced in reserve just in case one of the knives gets run over by a tank. <img src="/ubbthreads/images/graemlins/laugh.gif" alt="" />