I wanted to bump this thread because the OP's wish has
sort of been granted in 7.1.
The BUTTONS folder as one new image inside -- 128RedButton.BLP -- which is a very large set of red buttons. Now, these aren't the exact same red buttons used in the mobile app, they're slightly different, but the quality is very high.
![Click image for larger version
Name: 128RedButton.png
Views: 462
Size: 127.7 KB
ID: 8857](https://www.wowinterface.com/forums/attachment.php?attachmentid=8857&thumb=1&d=1477617722)