For Rep rewards and spirit gear, I believe your only option is Cord of the Raven Queen. Nearly all other items are hit, int, stam stuff.
Reforge the hit off of it for spirit. It seems like, for preists, your only real options are tailoring recipies or running dungeons. And I know the drops in there are all luck based, so... good luck. :/
You're in luck, Addiena. There's oodles. Basically if it's mail and has int, it'll have spirit on there. Several quests give items, and there's quite a few rep items you can get. (helm from wildhammer/dragonmaw, belt from Ramkahen, boots at exalted w/ earthen ring, pants from Hyjal (I think..))
And don't forget rep rings, rep necklaces, rep cloaks... those are pretty universal for healers, and you can get 333 items+ for all those slots from rep.
I don't want to necro a post, but you can really quickly skim the little guide I made.
http://www.mmo-champion.com/threads/...05#post9806505
That's rep pieces for anything considered "healing".