Never know, they might have FMJ springs laying around. Might as well call.
The other option is to call around local spring shops and see if they have any laying around. I almost went this route, one local shop actually had 1 spring sitting on a shelf. I just couldn't find another one so I ordered from Espo.
Third option is to see how much a local spring shop will charge you to re-arch your current springs. However, you might find this is about the same price as new springs