Many delicatessens stock low salt 'gravy salt', or you can buy it online here:
http://www.parkersdeli.co.uk/acatalog/Parkers_ Deli_Gravy_Salts___Stock_153.html
Or, if you're feeling adventurous, you could try instant coffee! No, I'm not joking, this website says it works!:
http://www.lowsodiumcooking.com/free/BrownGrav yMix.htm
(The only problem with that recipe is I'm not too sure where you get 'Low Sodium Beef Bouillon'. Maybe a health food shop?).
Although you ask for a meat recipe, a veggie alternative might taste as good:
http://www.recipezaar.com/recipe/getrecipe.zsp ?id=14045
(Once again, though, there might be a problem with ingredients. Perhaps health food shops might stock low-sodium soy sauce?)
Here's another possibility:
http://www.cooks.com/rec/view/0,1725,159162-23 8205,00.html
(However, yet again, the question of where to obtain salt-free ingredients arises).
I'm not sure whether I've helped or not. You probably won't know either, until you've investigated what your local delicatessens and health food shops have to offer. At least I tried!
Chris