Where can I get them from?

I remember in an old post someone asked why their lo was biting chunks of wood from their cot and someone suggested getting a teething rail.

Well my lo is standing up and holding onto the cotsides. Today she has started to chew on them...I think teething is back. She only has two lil teeth but I dont know where is best to get the teething rails from I saw them online in Ikea but you can only get them in the shops. Shame cos I went there last w/e!

Can anybody help? xxx