Potential customer: "PRS should sell these pickups."
PRS Fan: "PRS has every right not to sell you those pickups!"
This response may be true but it isn't a factor in whether the company should sell them. It explains nothing and doesn't address the OP's frustration. Do you understand how that can be, shall we say, off-putting? It doesn't negate the fact that there is a significant demand for the 57/08 pickups that PRS is either failing or refusing to meet.