Granted, forgot the 330 kombi only come in Trend 😳
I'm very confused with this whole alloy thing your on about though...
Divide the gvw by 4 and make sure it covers axle weights and the 1250's, 16" more than cover
There are plenty of aftermarkets aswell at 18", and plenty of tyres to fit.
There was a comment that the wheel trims looked a bit pap, and you said it was because that ford only sold alloys to a 1250kg rating...
All my point was, whats that got to do with you having hub caps?