I am so sorry, first for your loss and secondly for the way you were treated. I agree that you need to speak to the vet about this. I can't imagine that he/she would allow that, ESPECIALLY since you've been going there for so long. You deserve much better treatment than what you received.
When I lived in NY and lost Jake, that vet sent a card and made a donation in Jake's name. (I forget now to who but it was some animal organization)
Here in TN, when we lost our Kayla on 9/8, the vet's office actually sent us flowers. I don't know if that is their normal procedure or they were just being extra nice since we were there ALOT during Kayla's illness. (and as dh pointed out, we paid for another college semester or two for the vet's son who is in vet school,

) Either way, it was a nice gesture and I will always remember how wonderful those people are.