What's this dumper and I need this part

[boxburn]

Hello. I have been recommended to try this forum to try and find out what dumper we have and if anyone knows where to get this part from.
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Here's the dumper:
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URL of the original image: http://boxburn.net/dumper1.jpg
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URL of the original image: http://boxburn.net/dumper2.jpg
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And here's the part. It is located between the gearbox output shaft and the driving axle input shaft. There are a total of 2 of them but the one we have is in an acceptable condition.
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URL of the original image: http://boxburn.net/connector.jpg
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Thank you to anyone who can help me out here.
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Thanks,
Anthony

[essexpete]

Google layrub flexible couplings.

[XS650]

Liner Roughrider 750 -

We may have been here before see this old thread-

Guy @ Liner Roughrider 750 Drive shaft coupling

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[boxburn]

Thanks to both of you. you have been very helpful.