Keeping Baytril on hand?

[Spaghetti]

So, I've been officially bitten by the giant snake bug. Joe has doubled his weight and grown almost a foot since I got him and is now all blue-eyed and ready to shed yet again. He's come a long way from that very rough start he had in February!

Anyways, I've now made plans to acquire a retic (looking for a tiger or super tiger) and, given my plans to buy a new (much bigger) house within the next six months, I have a feeling that this is only the beginning of my collection...particularly as far as retics go.

I was wondering....I've heard of people keeping baytril on hand at all times for these species, as they are prone to RIs. How does one go about doing that? With Joe, the vet charged me an exorbitant price for only 10 doses. Also, I had to get an appointment to see him. Now that I'm comfortable injecting the drug, I'd like to have some on hand just for emergencies, since I'll be keeping these species. Problem is, I have no idea how to acquire the baytril. Can anyone offer some advice on this?