You could just use the meat portion and save the bone for when you can afford a grinder. Yes, it will take a bit more time taking the meat off the bone but it's worth it. I have an electric grinder and it won't do bone period. I'm not putting the money out for a more expensive model either.
When I did manage to grind bones I didn't like the feel of them. I would much rather just give my cats a chicken back to chew on. But I understand space is an issue.
I googled where to buy taurine for you. I can find it here in one of the health food stores but not sure if you can in your area. There's lot of good info there.
You can also feed your cat(s) beef heart but it is important not to grind this. Give it to them whole. Grinding increases the surface area of the meat, exposing more of the taurine to the air. This results in oxidation of taurine and decreases the amount that is useful for the cat.
There is a lot of information available in our raw food forum. We also have a few folks who feed exclusive raw to their cats. Hopefully they will pop in soon. I'm still in the switch over stage with my gang.