Fuzzhead, that’s not a complete statement. Renthal Single Wall Motorcross bars (about £44) come in all sorts of shapes. They are BMX stem fitting, and you can use commonly found shims to fit standard stems (ie. not OS) You have to use the brace or they’ll snap, this makes the weight go up obviously. They are great for trail vibration reduction. Only used them on a Bighit bike where I wasn’t overly concerned about the weight though.
The Renthal site has diagrams off all the bars I think with sizings, although not sure it has degree measurements, so you need to get paper and a protractor out, that’s how I ended up buying the ones I did (16degs sweep, 8degs upsweep, 32″ wide, that I cut down to 29″ to suit me)