Here is a Lahti M40 lanyard available on Amazon.
https://www.amazon.ca/gunpartscorp-S.../dp/B07F98MBDZ
Notice by the square cinching slider the same stitched design as in Ridecontrol's lanyard
A lanyard is a cord, length of webbing, or strap that may serve any of various functions, which include a means of attachment, restraint, retrieval, and activation and deactivation. There are all sorts of lanyards for all sorts of guns. They are interchangeable as long as the lanyard passes through the lanyard loop IMO. Can we say with 100% certainty that Ridecontrol's lanyard is a genuine Lahti M40 lanyard ?? Perhaps not ... but I would bet $$ on it just not a lot.
Jerry's point is well taken though ... just because the lanyard fits would not make it a genuine Lahti lanyard.
One must do research to verify its authenticity but in the meantime it works for me.