Most toestraps are interchangeable.
During the aero fantasy days of the early 80's most of the better quality pedal manufacturers came out with pedals that took proprietary toeclips. That included Shimano, MKS, SR Sakae Ringyo, Maillard, Campagnolo and others.
25+ years on, many of those proprietary aero style toeclips can be a challenge to find.
Standard style toe clips for quill and "rat trap" pedals are still easy to find.
verktyg
Chas.