MK make one of these for pendants - quite big, but seems robust.
OTOH, I'm now replacing a number of recently installed BG switched brass and plastic lampholders in desklamps. They're so badly made that the switch actuator bar is breaking, owing to bad materials. It looks as if it's paxolin, but with no linen or paper reinforcement (quite translucent) and horribly weak. The design for combining switching and isolation unless pressed is a right bodge.
I'm also unconvinced that there's much benefit to doing this anyway. What's going to be pressed into a BC socket to touch the contacts, without risk that it will push in enough to make contact too? If we're that concerned about finger contact, we should use GU10s