Hello and welcome. Not sure if you are looking for flavored 50/50 pre-mixes or the pure VG unflavored (I am assuming the former. If you want just the unflavored, that can be found at almost any large Walmart or pharmacy. It is often labeled as just Glycerin. There are a number of flavored VG mixes with different vendors "specializing in different flavor types and intensities. Let us know and you will end up with as many recommendations are there are posts

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As for cleaning and clogging I use Highping's method on an occasional, but routine basis. Otherwise a simple blow "rinse, soak, blow, dry" in hot water or alcohol works for me.