Most of them seem to be 70-75mm wide in order to fit a 68 or 73mm bottom bracket shell. I'd really like some play and an easy fit for a carbon frame, and just use spacers to fill in the difference. Here is an image of what I would be looking for (they have it on Amazon.UK but not Amazon.USA).
https://m.media-amazon.com/images/I/51uZcYotFvL.jpg
https://m.media-amazon.com/images/I/51uZcYotFvL.jpg