Roof mounted air foil

[misterNNL]

I was. Looking through some posted photos today and saw a resin Vintage International bread truck style van as a work in progress model under a listing for Detroit madness. It featured a large aerodynamic air foil on the roof that I would like to replicate. Does anyone have addition pix of that model?

[fiatboy]

I have a little kit, by Aoshima, of several small wings, "GT  Wings", I think, but they are quite small but finely engraved.  They are more than a little finicky.