Went to Up and Running today, unfortunately didn't find them very useful

Got the feeling the guy just wanted to flog me the most expensive stuff and leave unfortunately so i didn't bother purchasing anything. I did get put on the treadmill and found my feet roll inwards a lot though, and was told i needed extra support shoes - Take it that would mean looking at motion control / support branded? Also in 4E width apparently, but thats nothing new as iv always had massively wide feet!
They were crazy comfy though compared to what I'm normally running in, so it does lead me to believe shoes are part of my problem.
Were is the best place to pick some up? Im struggling to find my size (11 4E in support)