Ha, I was just doing a search on Bryan's Drawing Needles and came across this thread from 2016! We stopped doing these as the manufacturer cottoned on to what they were being used for and started to charge us 75p per pipe and it was not feasible to pass this price on to the customer and so this was discontinued. Our shop customers (the old school mixers who remember them) constantly ask for these as they were very good at pulling up VG as well as PG and Flavours and fit all standard syringes. We did find a replacement in case anybody was interested -
https://www.thevaping.shop/bryans-mixing-needle-for-vg . Happy Mixing!