Finding polycaprolactone-related content can be difficult because products go by so many different names.
Brand names ranked by number of Google hits:
(is this a generic term for PCL plastic, or a genericized trademark?)
(by IC3D Industries)
Note that "pellets" was appended to each of the Google searches above, to make sure the Google hit count wasn't confused by other products of the same name. For example, "polymorph" is a common spell in D&D, and the "Polly Plastics" brand sells both rock tumbling media and PCL plastic.
This automatically adds ("polymorph" plastic) OR "Friendly Plastic" OR "PlastiMake" OR "InstaMorph" OR "Thermoworx" OR "ShapeLock" OR "Polydoh" OR polycaprolactone to each query.