If you have an emergency clinic near you that services small animals, I would check there. Most vets should also be able to get information for you.
While the monthly payments can be pricey, if you have a lot of animals and frequent vet bills, it would be worth looking into. When Bear had to have all of his surgeries and Soxie got sick, we wish we had had health insurance for them! We ended up using Care Credit, which was nice. Basically, it's a credit card you put vet expenses on, and you get six months interest free to pay it off. The downside: If you don't get it paid off in 6 months, the interest is STAGGERING!!
Good luck!