User blog comment:Artemis Paradox/The Official Monster Hunter Wikia Help Blog/@comment-3253026-20110612182412/@comment-969093-20110612201754

You can trade some items for them with the veggie elder but I don't know that list off the top of my head. You'd have to look that one up. Generally though, keep farming. Volcano runs and if you feel like killing you can also fight Gravios and try to carve them from the tail (some people are bored like that lol).

Sorry mate, you're already doing the recommendable thing when it comes to farming firestones. Better stick to it. And also, I needed them as fuck as well in mhf1 last week... now THAT is a pain... ^_^ (">.>)