You can order it from places like Oma‘s pride. But I think your idea of getting a good grinder would be the best. I have a grinder that will grind up smaller things but not large chicken bones or turkey or beef. It works well for Cornish game hens.Thank you all for the welcome.
I am seriously considering just buying a good grinder and doing it myself. I did that before but found that it was so time-consuming and messy, and the grinder sometimes got stuck making it a big hassle to disassemble it and start over. I suspect my problem was that my grinder just wasn't powerful enough.
Again, thanks for being such nice folks!