Had a company in Belgium Email us last week touting for customers
http://www.aero-sense.com/TKS.htm I think they have some.
We are down to our last 40 Lts, we tried to get some last week but could not find any. Silmed are quoting at least 7 days.
Try Aero-sense dont know what the shipping from Belgium would be. Alternativly try and find something that complies with DTD 406B, thats listed as an alternate for Diamond.