Touring seat options for J-motor KZs

What touring seats were ever offered for these years? There’s of course tons for the Zs but not for the J, CSR, and LTD.

I realize there’s nothing current, but wanted to narrow my searches. I have a cafe seat now and I’m getting old. 

Corbin seats would my first choise for touring long distance rides.

www.corbin.com/kawasaki/73kz.shtml

I second Corbin. I used to live 35 miles from them. If your are near enough, you can take your bike in and they will make it to fit you bottom.

Isn't the KZ1000J frame different from the LTD/CSR frame? The J-engined police bikes and the shaft drive frames are also different, aren't they?