Upgrade 160mm to 200mm disc brake rotor I want to upgrade my mtb's front brake to a 200 or 203mm brake rotor.

current setup (180mm):


My front fork's posts are for a 160mm rotor (without any adapters/brackets, with the brake caliper bolted directly to the fork a 160mm rotor fits).
I am currently using a 160mm-180mm adapter with a 180mm rotor but would like to upgrade to 200 or 203 mm rotor.

Questions:


I looked online and couldn't find any (front) 160-200mm or 160-203mm adapter brackets (PM-PM). 
Maybe I did not look in the right places, could anyone tell me where I could get such an adapter/what to look for when buying one?
Or should I use a combination of two adapter brackets? (160-180mm followed by a 180-200mm or 180-203mm bolted onto the first adapter bracket) (as can be seen in the images in this thread: https://forums.mtbr.com/brake-time/160-200mm-brake-adapter-919684.html )


My setup:
Fork: Rock Shocks Solo Air Spring 26"
Brake caliper (current): Magura MT4
Brake caliper (to be installed): Magura MT5

Thank you very much!
You need a +40mm post to post adapter. The Magura one is their part number QM42. Usually these kinds of adapters interchange between brands, but just getting the Magura one plus a Magura or Shimano 203mm rotor should set you up.