Definitly a need to improve the offence they can get from the C/PF slots a trade for a scoring rebounding PF would help a lot. The question is who could they get for Chandler the answer is probably not that much but maybe in a package they could get someone of some use.
the only problem with trading Chandler is it would make an undersized team even smaller.
decent trade options out there:
a cheaper FA option may Wilcox who would be of some use.
I'd be tempted to try and package a deal for boozer and hope all his bad injury Karma out the is gone. Would provide the bulls with a good balance.