I always wanted custom made softs....not sure if thats ever possible..
This may sound strange, but some one who makes custom made saddles might be able to help with pads; they are similar skills, working with padding and leather/ pu. Would probably cost you an arm and a leg!
With the troubles a mate has had with Indian suppliers and delivery dates maybe a uk partner that stocks in unbranded pads from India and is a distributor in England would in my eyes be as close as your going to get