You might head over to the Hometown forum, we've got a lot of people there who would probably help.
You didn't say what kind of pistol it was - you said just the barrel, which means I am assuming it's a wheelie and not an auto since you didn't say slide. Depending on how the rest of the frame looks
- you might be able to replace it, or have it replaced.
As far as the AK goes - you can get parts for those easily, and it would be a fun project to rebuild. Mosher's has Ak lower's in stock, and even a few parts kits - there are a number of places to get parts on line (at least until that new ATF thing goes into place).
That's what I'd likely do - but then - I like projects.
Of course, you could always just give/person to person transfer them to someone who likes projects ...