I'm actually a Sandgroper who's been bending bananas for 20 odd years so, no offence taken! I'm in contact with Dutch mob (https://www.cowacarparts.com/product/mg-f-kh-splitter-spoiler-nieuw/) that does sell them and MAY ship (at a cost), waiting to hear back.
But I had a look at the underside where it would be bolted and it doesn't seem like complicated 3D shape, so have started thinking about making one. There are carbon fibre (etc) suppliers/custom cutters nearby, so if I could work out a template, maybe it would be one way to go... I will see if anyone has done it before and has a design...
And yes, the bartering system is a good way to go. I have a regular coffee supply coming from Seattle by similar arrangement!