Well, I make the pads myself, but I'm also an expert in making shoes that incorporate the pads, To be honest, it's the first time that I have heard shoes be called in this term.
These days I tend to just focus on making the shoes as I dont believe that foreign objects to be stuffed into shoes and well, Whats on the market is not designed to last, the people that sell these things need to stay in business after all.
If you wish to check out the shoes that I make have a look at my retail website
I and the owner and shoe maker.
Thank you for your interest!