There isn't anything specific for your Chevy Mid Bus but there is an option for a universal, adjustable weld-on hitch.
For example, if your frame was 18" to a maximum of 60" then you could use the Curt Class 5 Universal Weld-on Hitch w/ Brackets # 15903.
I have added a link below to our entire selection of weld-on hitches for you. view full answer...