After market Gear Indicator

Have a 2005 GSXR750, and looking to add a gear indicator.Seems to be various opinions on Amazon or eBay, but not sure if any good. Any recommendations? Something I can add to a housing and mount to the clip on bar would be good.Know it isn’t a good habit to check a gear indicator on the track, but have had a few time when been in third and should have been in second. via /r/Trackdays https://www.reddit.com/r/Trackdays/comments/csswl6/after_market_gear_indicator/?utm_source=ifttt