I posted this on the linked thread, but have updated the links here. My PF has still not returned
I also suffered from PF a couple of years ago, but it was linked to very tight calf muscles. I had chronic exertional compartment syndrome in both calves, and having had a bi-lateral fasciotomy (cut the fascia surrounding the calf muscle to give it room) i began to suffer from really bad PF.
I used a combo of superfeet (as Ogri recommends) insoles, I have now changed these to SOLE footbeds which i prefer, and extensive calf stretching. I found normal calf stretches did not go deep enough, so in the recommendation of a physio I bought one of these:
https://www.amazon.co.uk/Trigger-Po...08&sr=8-15&keywords=trigger+point+performance
And one of these:
https://www.amazon.co.uk/66fit-Achi...&sr=8-3-fkmr2&keywords=calf+stretching+cradle
This allows a much stronger, focused and pro-longed stretch which made a huge difference to me. Essentially if the calves are too tight it effects your gait and both these factors apply more pressure to the foot fascia.
After about three weeks of using these the PF went away, and hasn't returned. I still use them both 2-3 times a week, my calves feel amazing after each session. They was quite expensive to buy, but only the same as 3-4 physio sessions would have been, and has proved to be a long term solution for a very painful and debilitating problem.
The fascia is a continuous membrane running through the body, if you have very tight calves this will have a direct effect on the feet. You can also use the massage balls in lieu of a tennis ball to massage the balls of your feet. They are a better size and don't compress as much. If you're walking around all day, especially in poor boots, then tight calves are almost an inevitability.
These are also well reviewed
https://www.amazon.co.uk/Physioworx...1BOYWI5U/ref=cm_cr_arp_d_pdt_img_sims?ie=UTF8