I don’t suppose anyone here has such a beastie do they?
Do you have one David? Or you want one?
I’m looking for someone with one for a little filming 
I see! 
Contact a Kwaka dealer such as Wheelpower in Raynes park. They will have a customer with one. There is a chap who goes in and out of wheelpower quite a lot who has one, could always ask.
That’s worth a go - cheers