Incra makes a metric version but it's stupidly expensive for the set I got...though I do like the Incra protractor...
The ones I use almost daily are an "off-brand" found on Amazon...they come in 180mm, 200mm, 300mm, and a less common 400mm...
I have them all and use them all at one time or another with the 180mm and 300mm being what I reach for the most...