Help Melbourne trip

Hi all

I will be in Melbourne in August and have 2 friends visiting from the US. We will have the day free (including a car) for birding on Saturday the 27th August.

Would anyone be able to come with us and may be take us to Werribbee? May be a quick look for Orange-bellied Parrot etc?

Thanks very much for any help – it will be greatly appreciated.
Phil.