Can checked has them as part of their small can gauge or a module individually. Could probably just configure it to flash a section of the screen different colours as you approach the shift point too as another alternative.

Outside of the track/strip, meh. And friends don't let friends buy monster tachos.

https://www.aliexpress.com/item/1005005952894041.html 3.75” one for 27 +gst shipped.   for Ali add things to cart, then there are 3 small icons next to item, the first is find similar, then add to Wishlist, and remove from cart. the find similar works pretty well.     Im looking at the F1 style ones with a row of LEDs that change colour until set point and then flash the whole bar.

I'm not into Same Gender relations, but $23'ish is $23'ish 😎      (sorry no actual positive contribution to the thread but kinda temped to buy for the Gravel Express LOL)   edit ah shoot near $40 for shipping   link for anyone else tempted (no kickback) : www.aliexpress.com/item/1005005439521584.html  

so yeah between 4 & 5k rev range