Hey Lia,
I would recommend buying plates etc. from either Carolina biological or from phenix research. How much do you need? More than happy to help you build a shopping cart. Also, you can use the autoclave at BOSSLAB for sterilization and disposal-depending on how many plates you need, it may make sense to pour your own instead of buying pre poured. Depending on the organism, you may not need to incubate it. Actually, if you are doing an environmental isolation, you probably don't want to incubate it to avoid growing any pathogens that are particularly fond of growing in warm mammals.
--A