Elaine, have you tried finding locally sourced herbs? You should be able to find quite a few herbs locally, from herbalists or herb shops. You might be able to find them online by using something like this:
www.nimh.org.uk/?page_id=1627 Here is a search I just did for UK, buying herbs:
/goo.gl/xKcXmYMake sure that the herbs they sell are organic and not sourced from China (too much contamination in that area of the world).
I hope this helps!