PVC straight connecter for plastic greenhouse (Ashfield CA14)

Does anyone have a spare straight connector for a plastic greenhouse. I am just putting together my new Woodside tomato house and manged to split one. They don't come with spares and I can't find the straight ones on the internet at all. As far as I can tell its 16mm dia and 60mm long. Alternatively if anyone has a piece of copper pipe that would go round it to protect the split, I could try that. It only needs to be 4omm to 60mm long as i don't have the means to shorten a longer piece. Anyone with any ideas are welcome to contact me.
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