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Once I had loads of these 5-curve spoked N-gauge/2mmFS wagon brake handwheels to spare, and tended to run out of the four straight spoked ones. However, since doing the armour plate trucks, which need four at a time give or take a not at all unprototypical replacement with another type, and using them on the Gramodels WD rectank and some more of my own too, I have finally run short. There's no point buying one 'stick' of them, they're so small the price is the same for three (maybe 4...?) so here goes. They printed well for me in smoothest fine detail plastic so I'm making them available for sale, but sometimes Shapeway's print experts worry that they won't print to the satisfaction of a customer order, and decline it. Get in touch if you have this problem ordering my designs and I'll send you a few that I have persuaded them to do using the "print it anyway" disclaimer. If you fancy a mixed set (combinations of 4-straight / 6-straight /5-curved) let me know and I'll load it up, but as I said we may have to resort to me ordering them first and sending them to you, so plan ahead for the added delay.
Look at my other brake handwheel models for photos etc. The six-spoke and maybe the four are also available in 3mm:1ft and 4mm:1ft. Not quite what you want? Let me know and I can probably design it for you.