KZ750B3 Exhaust

Hello All!
I'm looking to replace my exhaust on my KZ and the only aftermarket pipes that I can find are the MAC 2-1. My question is "are there any other aftermarket pipes (ie V+H, Kerker, etc) made for other bikes that fits mine as well? Maybe with a little alteration? Thanks for the help.

Mac sells a two int one and a two into two, and that's all I have been able to find.

There was a "Kerker clone" made for the 750 twins back in the 80's sold by JC Whitney. I got one for my twin back then, it made lot's of power but was LOUD and blocked the oil drain, interfered with the center stand, and was made of thin steel. So, there may be some used 2-1 setups around but the only new ones I have seen are MAC 2-1. I am running one of those now, if you buy one and need jetting advice, just post here.