Amba sauce - brand recommendation

My recipe for Amba is included in this recipe (which was a F52 finalist): https://food52.com/recipes/30927-chicken-amba-mango-condiment-sandwiches-with-lime-mayonnaise

Limor Laniado Tiroche had a recipe in Haaretz 2011, which I have loved & made repeatedly, used for gifts, picnics, etc. Cannot locate online now. But it is simplicity itself. For 4:
Saute slices from 1-2 lb eggplant. Boil 4 eggs to hard cooked stage, peel & slice. Make simple Israeli salad (tomato & cukes).
Stuff 4 pitas with the above
Provide one or more garnishes for people to add to taste:
Amba (as you mentioned), other pickle, tahini sauce, hummus, preserved lemon (cut in smallish dice), zhoug or other hot sauce.
On Amba, I use whatever I can find in the exotic section of the grocery or Indian provisions store. Have not yet found a favorite.
Another simple recipe that is, yes, available, from Bonnie Stern at National Post:
http://news.nationalpost.com/life/food-drink/how-to-bring-a-world-of-street-food-into-your-kitchen