A universal cradle apparatus having a pair of substantially rigid jaw structures each configured with a flange structure having a substantially planar mounting surface adapted for being secured to respective cooperating male and female portions of a spring-return clamping mechanism formed of telescoping male linear drive shaft and mating female linear drive channel. The two jaw structures are each configured with a shallow cup-shaped clamping surface that is projected above the respective flange structure. The jaw structures are mounted on the respective drive shaft and drive channel each having its respective cup-shaped interior clamping surface facing toward the clamping surface of the other jaw. A spring is coupled for biasing the male drive shaft into the mating female drive channel of the clamping mechanism, thereby driving the two jaw structures together along a linear drive axis of the clamping mechanism.