I've had a look at iherb.com
They do ship to the UK (although I don't know how much it costs yet).
The trouble is, I can't always tell if the products are suitable for vegetarians or not (religious dietary requirements).
Also, I'm still not sure of the recommended dosages.
If it's not too much trouble, would you be able to link to the exact products on iherb.com so I can see how many milligrams you use and the exact formulas which you've found to work.
If you could that would be great, but don't worry if it's too much trouble