I don't think so.

I haven't dealt with crypto providers much, but as i understand it the whole point of the two different "getInstance" methods is that in one case you are saying "get me an instance from whichever provider is configured in my JVM for "foo". In the other case you are saying "get me an instace from this provider, right here, this one, the one i'm passing you" -- all you have to do is make sure you have a constructed Provider object.

Even if I'm wrong, you can still modify the security providers list at run time... that's what Security.addProvider and Security.insertProviderAt are for.