I'll have a look at the crankcase availability, but I've yet to run into any NLA parts for 288's or 272's as they are still being built in Brazil. Even OEM cylinders for both saws are produced in Husky's Brazilian factory. (and are nice quality).
At about $1500, I'm guessing you could build one for yourself rather than have it shipped in. Either way you have to put it together, which is no big deal for most guys here. Since building your own isn't a legitimate factory saw with a serial number, you could save some money by going aftermarket on some of the external parts such as plastic, chain brake cover, handles, etc.
I've thought of this for a long time, and it would make for a fun project. Problem is, I'd just be buildiing a shelf queen. I've got got 3 decent 288's to play with, so a new one would just sit there.
EDIT: took a look; 288 crankcase is NLA.