May be worth getting in touch with this company- You could ask if they supply near you.
http://www.ianson.co.uk/products/coarse-rationsI was put on to them by my local country store. Ianson supplies feed to this store and they do a course mix suitable for cows AND goats and it's £10 for 25kg.
I think when I get my goats I may wean them onto this. I know my friend uses the sheep mix for her Shetlands and the sheep which I have fed LOVE it!
Just to add- they say they do a course mix which can be fed to all ruminants- one for cattle, goats and sheep- But advise a mineral lick- in my area the land is copper deficient so I would have a lick anyway.
Seems a good price though.