I received an email reply from Custom Stocks to a general enquiry about having CS500 stocks made for the HW99.

They say their CNC machine would require programming, which is time consuming, and would require a stock for the inletting dimensions, and ideally an action or dummy action or some type of jig for fitting.

They say obtaining these items would not be cost effective unless multiple orders were forthcoming, ideally from a shop that can order in bulk. I replied and asked if an order of 20 would be sufficient, but 2 days later have not heard anything back. I suspect the answer is no.

It was worth a try.