A company in the UK called WearMoi makes padded dancebelts that have the effect you're looking for. You can check them out at http://a5zencatalog.com/WearMoi/Mens_Dancewear.html
They have a nice selection of tights and unitards, too. Only problem is that they are overseas, so be prepared to wait for your order. (Don't worry about the British taxes, you won't be charged them. Also, the website has a built-in currency converter.)[/i]