I love my wife.
There's been quite a delay as I search for the next shape to go alongside the tub of conditioner i'd attached to the cut-down vase i'd bought.
Trawling through the shelves of the supermarkets, hardware stores and pound shops were turning up zilch - until my Wife suddenly pipes up with "can you use this?"
Use it? Its absolutely perfect.
After finding a few spacers between it and the conditioner tub a la the original, it was attached. Then I wrapped a strip of mesh from Halfords to try and replicate the diamond grip pattern on the still-unidentified original.
All I've got to do now is add some ribbing detail (thinking cable ties) to the new shape, and this upper section is done.