This is not the soup mix you requested ,but it's information that i would like to pass to you.
My wife works at one of the premiere Italian restaurants in Houston, and we have found that the best powered Chicken flavored base is from Alliant Service Inc. located in Deerfield Il..
It is thier chicken flavored base #575795.
This stuff with only salt and pepper and any veggies you like will make the best Chicken soup
this side of Grandmas!
Try it it's only ~$2.50/lb.!