Are there materials to craft Weapon repair kits, in Honest Hearts. I have to wait for the PS3 version to be available, and I've been avoiding spoiler treads and the HH section of the Fallout wiki, but I'm trying to figure out what to bring with me since there is a weight limit. So are there materials around for WRK's or do I need to plan to pack a few of those with me?

Yes you find some materials for it, but not a lot, and it's pretty spread out. I didn't find many wrenches for example. But you can pay to repair + there's usually enough dropping to self-repair the common weapons, at least. I wouldn't take more than 3 or 4 repair kits personally, if any.

I only plan on taking 2 weapons in with me. So I want to have WRK's for those weapons, though I will probably end up not using them once the weapons from the DLC start to become more and more accessible.

Not that the DLC lasts long enough to wear down a weapon.

I was alright on Weapon Repair Kits, you'll be fine. Just make sure the gear you bring is in top condition, and the only thing you'll need to worry about repairing once you get it in Zion is the http://fallout.wikia.com/wiki/Desert_Ranger_combat_armor gear.