Androtics (link) (https://pheromonelabs.com/) sells Dipropylene Glycol (DPG) in a 30ml dropper bottle which you can add to a mix to slow down dispersion.
Unless I’m mistaken, pure DPG ~is~ the ‘oil’ carrier in A314.
I’ve also used Glycerine USP (from your local pharma shop). Glycerine also ‘warms’ the skin, so it might be a push in terms of diffusion effect.
Try one drop of either in a 5ml spray mix. YMMV
PS: And thanks for all the reps, folks, much obliged, glad it was of use to so many people.