All it takes is someone with initiative.
In a sense, our creation and distribution of our group’s logo as window sticker, then the grille badge, then the embroidered patches are a “group buy”. Only the grille badge was sold for somewhat less than our survey indicated; patches and window stickers are given out as part of full membership.
Along the same lines the Pagoda World books fall into the same category.
Two years ago we arranged a special discount on a group buy for Blockley tires. They sold out.
So a small number of board members do these things.
Somebody needs to find the parts first. I found them for the later style, posted the Amazon link, but at $8 delivered for a set to do two cars, hardly worth a group buy.