If you really don't feel like handling this yourself, you can ask your butcher (if you can find one in this day and age) or simply purchase a mixture of pre-cut bone-in pieces. I'm not a fan of breast meat, but if you go that way make sure that the rib cage is still in place and that the entire wing has been removed. This is really more of a pressing and squeezing motion than it is a massage (or at least it's more shiatsu than Swedish).