I have a SPS stock that I painted years ago and I no longer use it. Matter of fact I have it in, "my soon to go to the dump" box. You can have it for $20. That should cover the shipping.
Is it wood or plastic?? I don't think I could reliably cut the plastic and make it work.
Please let me know. If it is wood, I'll PayPal u 20 bucks no problem.