Unless you can find a sympathetic glass blower, it's a total loss. I'd just bin it and get a new one.
I mean you could probably put two orings on the downstem, one inside, one out. like a grommet bong setup. But a pack of papers is about the same price as the orings.. soo.
Also - if you fix this guy or opt for a new one - consider cleaning it every now and then - it might surprise you how nice it is
Yep she's toast just get a new one. That looks really cheap anyway (no offense). I'd recommend if u want another cheap bong get a nice Chinese copy off dhgate. I've got a fake mobius coming in soon that only costs me like 30 bucks with 2 matrix percs. The real one would be like 300 at least probably.