I don't think Banner ever did that in comics. No single mention that I can recall. And, yes, I do think he can. It's only an extreme state of anger. If we better look at it, Green Scar is a much more controlled and focused incarnation than Fixit has ever been. That, in theory, should make it more difficult to reach WB levels.
In the end, all Hulks get stronger when madder. In Fixit's case, at least in the past, it would take more time to get strong enough to have Savage Hulk levels, for example. but i don't think that's even the case anymore. If he gets really pissed off, his strength will grow really fast too.