I've ordered kits from both Jase and Contingency and highly recommend both. Jase allows you to select all kinds of add ons which you may find useful, for reasonable prices.
Both allow you to reorder annually, so over time it's a good way to build a supply.
I went through a consult with Duration, however by the time I added on what I wanted the price skyrocketed. Quantities of meds were smaller too, however they offer the most options for add ons, by far.
Duration and Jase both offer pediatric options.