getting malpratice insurance as resident for moonlighing?

Malpractice insurers are to some extent state specific. So no, there are no 'links' anyone can reasonably give you.

call some insurance agencies and ask to speak to their medical malpractice rep. You can at least find out what companies are available in your state that way.

I have one place (urgent care) that covers malpractice for me and an ED that will cover it if I want but then pay me $30 less/hr. Even with EM coverage premiums (significantly higher than FM/urgent care) I come out ahead paying for it myself after about 3 shifts. By having my own coverage, they don't "own" me and expect me to do a certain 3 of shifts/month and I am available to take other things that come up. (some of our rural EDs have a week or two at a time with no coverage and are willing to pay a lot more b/c they are desperate)

If you accept coverage through any of the hospitals or ED groups, make sure you know what type of coverage it is (claims made vs. occurence), who holds the policy and get a copy of the certificate of coverage as well as the endorsement that lists you as covered locums provider.

Later on, when you buy 'real' malpractice insurance for your first job (or more typically your group buys it), you will have to list ALL professional activities since high-school. Your new 'claims made' insurer doesn't want to get stuck with stuff from some moonlight gig you did during residency (as they cover you for 'claims made', so if someone files suit 23 months after the 'tort' while you are insured with the new company, they get involved).