Yes, done it. Bought a 357 slide (didn't have 40 slide) and a 40 barrel from Midway shoots as good or better than the 9mm slide and barrel. Cost about $290 though.
Sad to say that S&W doesn't like their customers buying parts, They want you to buy GUNS. They are cutting off the supply of these parts. That is why people like Midway have limited or NO stock these days.