Just noticed you haven't got a response yet. I mostly do DIY (make my own) juices but most pre-made juices come in 3 mg (might be hard to find 1.5mg) You could mix some high VG 3 mg
juice with PG (commonly available) and get it down to about 2 mg and end up close to 50/50. Unfortunately, it will also dilute the flavor. It would help if we knew your location (no need to be specific... just a general idea) I guess the easient way (besides making your own) would be to
buy two bottles of the same flavor... one 3mg and one 0mg and mix them.