Need some help on finding a bucket for my Backhoe

I'm a new owner of a Case 680H backhoe and looking to purchase a 36" bucket. It has a Wain Roy coupler. Will any Wain Roy bucket work or is there some specifics I need to look for. Sorry if the has been ask before I did a quick search and didn't find anything. But I know next to nothing about heave equipment. If it helps here is a current picture of one of my buckets. http://ift.tt/1dHAWtb

Need some help on finding a bucket for my Backhoe