Where can I buy thick walled rubber rugby ball shaped dog toys?

Our dog found a mangled one of these and was very keen to play with it. It is 5" from point to point and 9"-10" at its maximum circumference in the middle. The wall thickness varies but is never less than 0.5". It is orange in colour and seems to be made of rubber. I would like to purchase an intact one of these. Does anybody know where I can get one of these and whether or not they have a specific name? I am assuming that the one found was a misplaced pet toy but if someone knows otherwise that might help my search. Thanks in anticipation of helpful replies.