I saw your other thread...is it possible that maybe a different vet would prescribe Lev for you?
Another option- Lantus ( Glargine) is similar to Lev...is that available to you?
Several of us here get our Lev online for Canadian pharmacies, you could try calling or emailing some of them.
I do suggest you have a vet on board with your insulin decision if at all possible. This message board is awesome and full of knowledge and caring people that could help you through using a new insulin, but you never know when you'll actually need a real live 3 dimensional person for local help and it would be best if you could have a medical professional at least prescribing the insulin.
How many other vets are nearby? Is there one that may be a bit further away but you'd be willing to drive to?
Let us know how your search goes, and good luck with it!