Good to get new sposors on board a JB Hi Fi or Commonwealth Bank with their yellow and black logos would work well.
Very unlikely for any sporting code and its club's to get new sponsor's now in the current environment
Key focus is keep the ones you have and get them to renew. Think all club's and codes can expect that there will likely be a drop in the $$$ on offer going forward on the short term
And just on your 2 suggestions. CBA sponsor's cricket in particular the Aust Women's team. They're being sponsoring them for over a decade. They actually pulled sponsorship $$ for men's cricket about 2 years ago
JB have never shown any interest in sponsoring sports. Their focus the last few years has been gobbling up their competition (buying other like companies). Think in the current economic climatethey won't be slashing $$ on sport sponsorship