Where can I download additional mdb files for toolbox (such as shoulderbolts)?
Welcome to SolidWorks forums John.
You will not find mdb files but you get the 3d models. Some of the site to look for models are:
You can also add the sizes to the mdb files by editing it using Microsoft Access. But make sure to keep a back up.
You might also find this post helpful for your future reference
Retrieving data ...