Where can I get patterns for the costumes that Lady Morgana, Gwenivere, Arthur and merlin wear on the BBC Merlin Show?

I have a dress very similar to Morgana's which I got from a Simplicity pattern in the Costumes Section.
I then just choose the fabric and bits and pieces that went with it.
You can do the same for Gwen. I bought my pattern from my local fabric and sewing shop but you can go here to find the pattern that I used.
link
This URL will take you to a page of patterns, and heaps of the patterns are for costumes a lot like Arthur’s, Merlin and Gwen and Morgana. Just have a good look!
The photo below is the one I used, and you can find it on link above too.