Hi Road Runners
At a recent running CPD a company called ENERTOR gave us a talk and some of their insoles to try. I have found them to be really comfortable. If not completely happy they will give full refund within 30 days. As an offer at the moment you can get 35% discount if you use this link
They should last you through two or three pairs of shoes not just one as most regular insoles do. Happy running.