[Yellow_Festiva]

Ok... if you want to do it on the cheap to get yourself out of trouble just rip out the old one and take it to a Super Cheap etc and rummage through their stock to find something 'close enough'. You can also get creative and find one, cut it and extend / bend it using some pipe parts (perhaps even heavy duty plastic?) and use those steel threaded collars to join it all back together. Gluing the joins will help if the join isn't tight.

Is the split going lengthways or does it appear like someone has cut into it with a knife? If the latter, you may be able to finish the cut and just join it back together with a bit of pipe as mentioned above.

It won't be pretty, you may loose some flow but a few hrs and a bit of creative tinkering will get you on the road for the short term at least.

Is the engine / frame shared with another more common car?? May be another option.

Goods luck!