Importing multiple stl files

I wrote software that exports thousands of individual cylinders that overlap (they form the microvascular structure of a model I’m building). I would like to use the union tool to merge all these cylinders into a single branching structure, but the only way to use that is if sketchup recognizes them as solids. Is there a way I could generate a binary sketchup file with each cylinder already defined as an solid or is there a way I can import thousands of stl files into sketchup in a batch, and then run the operation once everything is imported?

Perhaps (if you are using the desktop version of SU):
[Plugin] Import ALL from Folder