^how much do you think everyone is willing to shell out for these? I have the tools, and software, to make an accurate digital model, and my friend works as a machinist and able (not necessarily wanting to) to do these.
for fabrication, many people think you just plop the digital model in the comp, throw on a piece of medal, and press a button, but it's not that simple. But if the money talks, he might be able to justify the hrs spent making these
Since you know what fabricating one of these entails, maybe have that convo with your buddy and give him the rundown of what it would take. How much experience does he have? If he knows what he’s doing, he should be able to come up with an honest estimate for a pair of knobs. The type of machinery he uses has a big impact on cost.
Maybe shenaniganz or someone else who has V6P knobs can give an idea of dimensions to get a more accurate estimate from the machinist.