pistol grip handles

ive seen several to many NOS right side grips for sale but have never seen a left side.

Does anyone have any reasoning?

Nope, but I have noticed that it's been that way for a long time

Left side was the first to go NS-1.
I remember back in the late 80's early 90's ordering them in batches of 50 pair after a friend in the US told me they had gone obsolete.
Eventually I started getting only right sides, left side were NLS, NO Longer Serviced.