Yep, them or Lawrence & Hanson (L&H). You will be able to get black plates and stainless covers at most of these places.

You may have to order in the black RJ45 jacks. Make sure you get the right ones, krone are square and dont fit clipsal / hpm plates.

e.g. these are bad unless you have the krone plates

As stated use an electrical wholesaler.
The items may need to be order in.
From the photo it looks like Clipsal C2000 series plates in Black with brushed Aliminuim covers.
To get clipsal black cat 5e mechs I think the part no should be
30RJ88SMA5, BK

How are you terminating it at the other end? Just straight out of the wall into a home grade router or are you going a Cabinet and patch panel solution?

Goodluck finding anything but white. My suggestion... Pull the white jack off the rj45 and spray paint it.

Thanks for the tip. Will chase it up on tuesday.

Make sure that you speak to you home insurance first. As stupid as it sounds, it is not legal to put permanent network cabling in the house unless you have the certificate for it (no idea which one). Most insurance companies don't mind you doing it, but some do and they could refuse a claim in some instances.
Putting network cabling through your house over the floor is fine though...soooo stupid

Adi