Checked with Gary at Dave Howell this am. He does have Toyo's for Rv but they are in short supply.
He has only 4 245/75R22.5 which replace the Michelin 235/80, they have been on back order and he just received 4.
He has 14 of 265/75R22.5 (equivalent to 255/80R22.5) in stock.
All came in recently, so things may improve-- Call him when you get close to check status. Gary is the manager, 850 476 7026
hope this helps
Hooligan, Pensacola, Fl -U.S. Coast Guard 1956-1985
2016 Thor Siesta Sprinter 24ST diesel
Our Pug "Lily" & "George" the Newfoundland