Cab Air Ride for a 1986 KW900 with a. Sleeper

I am looking fixing up a 1986 W900 to be my daily driver.
However, the cab and sleeper are both mounted directly to the frame.
Did anyone make an after market subframe kit to mount the cab and sleeper to for a cab air ride conversion?
Or if anyone has already done this did you make plans or copies?
I just done want to reinvent the wheel.
I hope some one has done it and would like to share.

 

Thanks for your input. It does habe air ride on the suspension.
I just like the extra cushion of an air ride cab. Most cab air rides use a flex mount towards the front and air bags on the rear mounts.
Thanks

 

Thanks for the link. I appreciate it.

 

Thanks for the info, I am going to start on my project next month. I will check into the factory setup.
Sharp looking truck.
Have you done much to the inside of the cab? Interested in any updates you might have done.