Coral Frag Holders

Coral Frag Holders for transportation, must fit inside a cup, (see photo/s).this will be used to make coral shipping and transport the safest possible! Spring-like legs and hoop securely hold the frag in a stable position during transport. I need a design similar to the ones in the photos, or something better. Looking for a 3d STL file, will need two, one for the base, and one for applying pressure from the lid of the cup.