My mid-2012 rMBP has been showing 'Service Battery' for a long time now and can't really be used any longer without being plugged in. Cycle count is currently at 831. Last week I went to an Apple Authorized Service Provider in Amsterdam. They ran their tests, confirmed that it needs to be replaced and then told me exactly what this article reports, that there are currently no top cases available and I should check again in September. Didn't mention the options of a free replacement in September or even an exchange. Same machine also has that screen coating issue. Guess I should make and appointment and try my luck at the Genius Bar instead.