I made some a couple of years ago but I'm still using it - what I did was look at a whole bunch of copy-cat and personal recipe sites and did a blend with things I liked best in the highest quantity and left out things I could not eat (like shrimp egg powder I am horribly allergic to shell fish). Not all recipes have that last one anyway, but a lot of commercial powders do so I avoid them - you could try the same thing - just make up a small batch of one that sounds good and try it.
If that doesn't quite do it than try a different one - if I recall most were fairly similar on the basics, but just varied in some extras - I suspect it is something that different families and different regions of the area had their own take on. Add that to the modern tendency to take "ethnic" foods and "tweek" them by large food companies and there are probably quite a few "acceptable" variations you can try.
Good luck, and please post the one you settle on.
expatriate Californian living in rural Ireland with husband, dogs, horses. garden and many, many cats