Sorry I cannot be too specific I'm sorry and we have a coaches corner set up on the runningproject discord site so there may be some more people from the US that can help. (https://discordapp.com/channels/420968382201069570/420999478074671105)

But having said that, I have just been in the US last week and know for a fact that that Dicks Sporting Goods has treadmills that they have for customers to use so they can asses and recommend a shoe for you specifically. If you try their site as you can find a location, hopefully near you(https://www.dickssportinggoods.com/s/stores)

Hope that helps.

Regards @run.vince.run