Paints, airbrushes etc

Model railroading is a hobby with many sides, and you have to be a bit of a jack of all trades.  Modeling an American prototype comes with it's own challenges, particularly if you are based in Europe, like me.

There's all sorts of fantastic articles on the web and magazines and referring to several great products, only to find that they are sometimes hard to get on this side of the pond. My current task (among others) is trying to locate a few sources that supply the railroad colour range of Testors paints. More precise their Floquil Poly S paints. I found one shop so far that has a fair selection in stock, but as luck should always have it, there are a few not listed that I need. (not listed means out of stock in this case), this is Model Junction based in Slough UK. A great shop, but I'm looking for alternative sources, simply because I don't want to have to wait weeks for a simple bottle of paint for them to order it in the US I'd like to have a few sources so that if one doesn't have it, someone else may do and I can keep going with my modeling in a reasonable time frame. Seems only fair right? If you know of any others in the UK, be sure to let me know via a comment here, and share it with others. A similar issue I'm having currently with my airbrush. Mine is a DeVilbiss. I hadn't used it for years and now I'm preparing for that again, but what has happened here? DeVilbiss has specialised in paint guns for the automotive industry, and sold most of their airbrush production to a chinese company who still markets them under the same name, but the quality is reportedly not quite the same. Mine is a pre take over model. Anyway, so finding parts, hoses and other accessories for these is proving hard too, not in the least because there are several different manufacturers that use different fittings , couplings etc on their hoses and I'm not entirely sure what I have on mine...  So another challenge here.