'80 1000 g front master cylinder, which style is correct-round or square?

Hey guys, I'm looking to rebuild the master cylinder on my G, but I'm not sure if it's origional. It's a round one with a translucent plastic reserve cup. Buykaw.com shows a square metal one. Is the square one correct for the model, or are there other G models out there with the round cup? If the plastic one isn't correct for the model/year, is it appropriate for the dual rotor setup? Thanks in advance!

It should be rectangular with a crazy angle so it sits level with the "G" handlebars.
I have one somewhere. Maybe Gringo can send a pic of his mounted and you will understand the angle i am talking about. Roy

Gringo can get a better pic. Roy

I don't know how well this will show up when it is shrunken down to fit this site. If you need a better pic send me a PM with your email address and I can email you the full size pic. You can use a round master cylinder as long as it is a 5/8 type set up for dual discs, but as mentioned with the stock bars it will sit at an odd angle. The one thing strange about the G-1 is the sight glass is very small compared to what was used on other KZ's.