A custom 89 I drew up, based on something I wrote. Seriously, what this is based on is not even a quarter inch wide. Another reason is because 89 is a very unused number. It has a bit of a legacy-team vibe to it, sorta like Petty Enterprises or whatever. If it looks like an existing font, I can assure you it is not. The icon does not show all of the outline layers. A comparison with my favorites and with all available outlines is below, so you can mix and match at your leisure.
