Can I still get support for a PowerBook G3 here?

Apple does not support them. Questions about them for other end users should be posted where you are, in "Older Hardware."

One of the most knowledgeable G3 PowerBook end-user exerts, jpl, has not been active here for a long time. I have overhauled and upgraded a few "Wallstreet" G3s, but that was almost 20 years ago. Since then the parts supply for these seems to have diminished to a trickle of what it was once.

You can def still get support here. I enjoy working with older tech and have had a PowerBook G3 Pismo several years back.