It's hard. First, most people would want PBT spacebars. But nobody wants to make molds for those, or if they do, the prices are outrageous. Second, even if we accepted ABS, a mold would still need to be created. I'm sure we could get it done. Someone would need to start a GB, send SP a spacebar, have them make the mold (which won't be cheap in and of itself), and then get runs going for them.
That is, IF SP would do that. Has anyone ever checked?