Marty ... I regularly use http://pdc.ca/rr/catalog for all of my decal work (just rec'd 23 sheets for my O scale SOU gon yesterday).  Bill can create artwork if you need.  Very fast delivery from a US address as well as Canadian.  He uses the same printing system as Tichy but has tweaked it to result in much thinner graphics that are opaque and easily nestled down with Microscale and Solvaset.
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Jim King
www.smokymountainmodelworks.com