If i remember correctly,Mandi have seen an ad advertising for chastity bra(something I fear a lot)when her parents have received her chastity belt;it is pretty logical they advertise some products which can be interesting for people who bought a chastity belt,so I think it is possible there is some ads for thigh bands.
But they may think it is too hard,too restrictive(and yes,it is),so decided to not order it.