The Prevost engine cradle kit 410805 looks to contain the draw bar receiver that the draw bar with ball (supplied by others) goes into.
It is possible to purchase a draw bar and ball with up to 30,000, which is what I personally would do. (over kill here is good)
I also would only buy from a trusted manufacturing source, such as, but not limited to Draw-tite.
Some general Google searching for--30,000# hitch ball-- etc will reveal many selections.
This post is aimed at a specific question and is not to imply that anyone could or should increase their towing capacity simply by using a higher rated draw bar and ball than the receiver and cradle.
Check the specifications and ratings and condition of your tow receiver before you begin to tow.
I will try to insert a previous post here as it pertains.
Well according to Kevin it takes a new engine cradle when one installs a 20,000# hitch.
Kevin did his own install, wow, very commendable, and it took 8 hrs!
Checked pricing on a 20,000# kit from Prevo today and they verified the need for a new engine cradle.
The kit part number is: 410805, priced at $1,368.97. Non stocking, made to order only @ 40 days lead time. (The factory is on two week shutdown now, so add that in)
They now have a policy of: The kit is not sold to anyone for a do it yourself installation.
Prevost must do the install, due to liability issues!
This will not be happening any time soon for me if ever.
Still gathering information on toads and trailer.
NOTE: The cradle assenbly part number pertains to my vintage XLV .
JIM