Swingarm bearing kit for a 78 kz1000 A2A

I just realized I need to get a new set , the last ones lasted 60,000 but it's time, I see that Z1 has 1 that is for the kz900 that looks like the 4- bearing setup that I have but it's not in stock.    www.z1enterprises.com/swingarm-bearing-kit-z1-kz900.html

Anyone know a source for these?  or know of an alternate setup that will work?

Update; I read the instructions on the Z1E page and it says to torque the pivot bolt nut to ( 22-28 foot lbs) so I checked mine and it was majorly loose, I torqued it down to 25 ft lbs and the lateral play disappeared, hallelujah !!!! 
I probably have not checked it in 6 years, so folks check your swingarms....

Try Webike.

japan.webike.net/products/21756471.html

Glad you caught the problem befor it became catastrophic. For future reference, All Balls may also be a source.