I ran into that problem before. If you have plans on dumping the carb, a permanent/last resort fix would be to JB weld it back in place (I used some similar stuff my neighbor uses to fix boat props with). I would only do that if you plan to get rid of the carb, if you want to keep it, Im sure there are places to fix something like that, Im not sure how to do it myself.

I only did this to that carb because it was way beyond repair. The top section of the body had sections broken off making the accelerator pump useless and had many other internal problems.