SanMar and SS are typically are go to here. I'm assuming since it's structured it's either going to be mid profile or low profile as that is the most common requested, but if they want high profile, I haven't checked to see if they have a high profile structured with mesh backings. Typically high profile tends to go foam with mess, not all the time, but that tends to be more the case then not, so may want to make sure if they are wanting high profile.