the Co2 tank seems like the way to go , especially for tyre duties ...
my ARB compressor died in the 'noos after last OzDay w/end , so i'm in the same boat
Also Jeffy , i've recently found out too that a few alfas were fitted with yorks for a/c and i've got a couple units lying around , just need to check if mine are actually yorks and the appropriate models ... fingerscrossed i may have one
and a spare