Ive seen these repaired with gel super glue. My choice would be epoxy
Interestingly enough, I called around and not a single store in my town has weld on for acrylic. Nor do any within 100 kilometres. Looking online, it is available in Canada, but the shipping prices are absurd. $34 to ship a $10 1/4 pint can.Just get some weld 4 and run a little into the crack. It will fix it properly. Anyone recommending anything else has no idea what they are talking about. Weld-on 4 is like water and will just run right into the crack and weld it back together