Thank you both very much for your speedy replies. While I'm disappointed with the idea of not being able to repair my barrel (it's original, with the matching serial numbers from the frame, slide and barrel), I wouldn't want to risk more damage to the firearm, or more importantly, any bystanders or myself. I will, of course, keep the current barrel, if only so I have all the original components.
It may be some time before I can get a new barrel, since I'm currently trying to get setup for reloading. But if you wouldn't mind sharing, I'd love to know where you're finding that great deal on ammo. The only other place I've found it in regular supply is at Academy, and it's $28/50 rounds for Winchester.