Well, you're in luck! Once you get to Mateyo there's actually a "hidden" Crowbar accessible...other than that, you will be able to buy the Crowbar once you complete Nyla's final "Profit Margins" quest (the one where you unlock Hunters' Guild gear).
NOTE: While you're on Mateyo, be sure to grab a Machete as well! It's essential for getting around the jungle area, and it doubles as a decent (and blade mod compatible) 1-Handed weapon!
Hope you are enjoying the game, and if you are still having trouble (with this or anything else) just let me know!