minolta makes a fitted case. very difficult to find and price to return ratio is low. look for a good well sized camera bag like lowepro or tamrac. go to your local store who carries an assortment with a tape measure. bring all the goodies and toys your going to want to carry with you and start to play. decide your preferred size and shape. copy it down and look at all the options. also think of growth. you know all those things you forgot the first time fitting and the additionals you'll want to weigh yourself down with.
there are others too. check out warranty info on each.