Yes, I understand and respect that. I've kept some fish, or kept them longer than I'd have preferred, for similar reasons. Craigslist is a possibility. If it was me, I'd first try trading him (or giving him) back to a pet store, mainly because it would be a quicker solution (different approach than if I've got expensive fish that I want to get better value for). Some fish stores readily trade fish, some not so much but explaining your tank repair/small tank emergency might get them to help you out.
Yes, great fish for the right person and tank. Get big, eat a lot, grow fast, needs a big tank and good filtration, etc. Impressive in a group in a big tank. Not a good thing if it's not what you bargained for or wanted to dedicate tank space to keeping. I'd suggest the same thing as above if it's not something you'll have room for. Depending on your location, you might also be able to list it here and find someone interested.