Ok mate, I see we are on a similar wavelength - I'm no Phd either, merely C,Chem MRSC, but I did spend a considerable part of my career bringing an optically active version of a phenoxy herbicide to market.
Very surprised if I am honest to see such references on here - you use flavours, I prefer Left or right handed, but I guess we both know what we mean.
I come back to it though, yes, pure r(+) might be ideal, but the racemate will be probably be helpful too. I doubt anyone has made the effort to purify s(-) and so you can probably buy either pure r flavour, or a mix of r and s, both of which may be helpful if - and only if - your problems are those that might be helped by it.
But actually, I think you are not quite right with your differentiation between isomers and enantiomers - isomers are structurally different while enantiomers are structurally identical, just with a chiral centre.