I asked Paul Watts this question recently, and he replied "you can usually find them for around forty bucks".
I asked because my HW30 was broken in half by UPS on its way to visit Paul. I was hoping I could keep the barrel and action, but UPS spirited the whole mess away when they paid up the insurance. So,the bottom line is that some lower level functionary at UPS may want your stock....
I took the insurance money and what I had budgeted for the PW tune and bought a R7. It arrived last weekend, and I'm loving it. You will love yours too.