The thing is this: My picture was taken from an eBay ad, where it was advertised for sale as built by the current owner. It could be a kit, which means that there would be more of them, but it doesn't really look like a kit - especially not in the other picture I've got of it, which is a rear-end one. In the ad, from June last year, it's listed with a specific name that has not yet been mentioned.
Here's the other pic: