Many do .. among them Flavour Art (
Fai da te - Flavourart. La sartoria degli aromi), Easy Liquid (
Eliquid Small bottles with great flavor PG and VG base) ...actually most shops where you can
buy liquid nowadays also offer DIY neutral Base liquid. (That's what you're looking for, yes?) ... Otherwise, if you look for good ready-made liquids which are made on a PG/VG base, look into the "Heaven
juice Mix & Take" section of the Flavour Art website to which I linked above. Don't forget to indicate the percentage of your chosen aroma, otherwise they will add just 2% which is far too low for most of their aromas... 4% is where taste starts ... and generally, you should be safe with an aroma percentage between 4% and 7% ... that's about the average I use. I know ppl who use only 3%, but most go a bit higher than that.
Edit: If you want a completely EU made liquid, then stick with FA. EasyLiquid seems to be importing from China.