My 1/12th Hudy arbor did come with a sleeve.
I don't know if there're still in stock, but I bought my Hudy 1/12th arbor from: http://www.larrysperformancercs.com/
(they are located in MI). Great service, BTW.
Looking at the UPS web site, my Integy Tire Truer ordered from SpeedTech R/C
is "Scheduled for Delivery" today.