when no doubt there are hulls stored out of use in the Arizona desert that could be leased in at affordable rates
The availability of A330-200s is already an issue as there is already a shortage. Are you suggesting BMI get hold of some DC10s or TriStars from the desert? How about some Air Canada 767s flown since the 1980s? How about the ex BA B747-400s being released from service? The costs of introducing a new sub fleet can be pretty high so NOT gonna happen.
And before anyone jumps in, the 757s are operated by Astraeus....on behalf of BMI.