PAG car conditioning oil - just a few ml (Eastburn BD20)

I'm needing some PAG oil, which is used in car air conditioning systems. I only want a few drops to lubricate some seals as I reassemble part of a system, but it seems to be only available to buy in fairly big containers. Has anyone got some left over from a job or could spare me a few ml ? Will collect and bring a suitable container. Many thanks.