The 19g is popular,there was another forum member that was looking Hi and Low for one. They were told that as soon as the ones that are in service now hit the target time or mileage they will be pulled out of service and sent in for refurb.
You might call the center in Arizona and see if any have been there yet for refurbishing, 888-660-8152 ,they may have a waiting list you could get on,I know that it worked for someone that wanted a certain RV.
2006 TIOGA 26Q CHEVY 6.0 WORKHORSE VORTECFormer El Monte RV RentalRetired Teamster Local 692Buying A Rental Class C