Hi
Kansas State told me when I called that they would not send me a duplicate. If I remember correctly, they told me they "didn't do that"(which is NOT true). Once my vet called, a duplicate original (with original sticker) was sent. This duplicate original will not cost anything.
I can remember getting advice from UKY I should be firm and tell the vet that the whole reason I got the blood test was for this original document proving the rabies test was okay and for no other reason. They owe you the original -- you paid a lot of money for it. You should insist that your vet (or the other company involved) act as a liason with Kansas State and tell them the original was never received and to re-send a duplicate ORIGINAL. It's true that the original could have gotten lost in the mail, but I'm guessing the vet misplaced it ... or threw it away (my vet did!).
When we had the fiasco with the same document and with our cat's incorrect microchip number, at first we were treatly very rudely by the office manager at our vet's office. In fact, she was downright ugly to us. After she had a talk with the managing doctor and they called DEFRA, she changed her tune. I don't think anyone realises how important these documents and correct information are to those of us going through this.
Please be firm and tell the vet (or other company) they must do this for you or you will have to get the blood test re-done (at their expense, since now you have no proof it was ever done and they did not follow through). You are totally within your rights to ask them to do this.
Good luck and let me know how it goes.
Caroline & Brendan