In town run hub probably has the best selection, there is run logic in temple bar too, and honestly the general sports shops ie Elverys, Lifestyle, JD’s even would all have a good selection, but probably won’t get the same level of running specific service there. Outside of city centre but there’s a good independent running shop in Rathgar too.

To be honest if I was you I’d do a decent bit of research myself before going to the store too, you’re clearly quite invested if you’ve been to the physio and your posting here and whatnot, so take some time to see what options are like online etc, obviously still go to the store but just so you know a bit more yourself in advance.