The Keystone service center does not keep a large inventory of parts .What is there are mostly common parts that the service center uses on a daily basis. we have seen the parts order system in action. Dealer orders part. Keystone service center gets the order. keystone orders part from vendor. Example Keystone does not have holding tanks in stock they order from the vendor which is nearby. Vendor sends the part to Keystone service center, service center sends to you dealer. From the dates you provided you got the parts fairly fast.
When the dealer orders parts the order invoice should be given to the customer so that we know that it is ordered. It is by Computer. If the dealer orders it the service center gets it that day.