If you're working your way through nightshifted's rec list you should definitely find what you're looking for.

If you're into AU definitely try out lynnearlington's cop fic (she has some good canon stuff too), losdosmos's western fic (I think she has some Heya in her masterlist too), and letscall_l.

gilligankane and novel_concept26 are really good too.

Also, she's mostly write Rachel/Quinn but it's well-written with side Brittany/Santana - powergrapes.

I've probably just re-iterated that rec list, but hey ho. Also, there's a Heather/Naya community round and about somewhere, but you'd probably have to do a lot of rifling to get to the good stuff.