Fork Boots/Gaiters for KZ200

I decided to put fork gaiters on my 78' KZ200. The problem is that my bike is in my friends garage and he had to go out of town for a week so I can not access the bike to measure the fork tubes. I was wondering if anyone here knows of a gaiter that would work for this bike. There are 1000's of choices on ebay. Thanks in advance.

Just wondering why you want to put those things on a real nice stock bike.

The Ohio Cafe Racers fork tube conversion chart lists the KZ200 at 31 mm.
You'll probably need the measurement for the lower tubes as well.