In Need of Similac Pro Total Comfort for 5 month old

Hi Everyone- My name is Emily and I am in the Southwest suburbs of Chicago. I am looking for Similac Pro Total Comfort powder formula for my baby boy. We have tried others and he does not do well with them. He has had some health concerns and medical issues since birth and I am terrified we will run out soon with only one can left. I am willing to pay, or meet, anything. Anyone able to please help!? Thanks In Advance!