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I would get it welded cos it aint gonna stop leaking. But i would also drill a small hole at the end of the crack before getting it welded to stop...
Cant look through my purchase history on my phone unfortunately. I think it was this one on ebay.com.au currently listed 321067792772. If u want...
I bought an electronic version of the standard one fitted from evilbay for about $12 and solved the problem.