So I've been working on the start to a Felucia board, and I wanted to have some large center pieces from the Clone Wars, namely an AT-TE or LAAT. I've had no luck finding the AT-TE around 1/48 scale, probably because they were never made that size. During my search though, I found this website that has a huge amount of Star Wars minis, models, figures, and more broken down into their specs - scale, actual size, and reference size.
Scale Charts!
I found this site a few weeks ago. If you are like me and new to modeling/painting, he has some nice tutorials. Also, detailed explanation of different types of modeling tools. Very handy site.
Locally, I have access to some of the older models listed. Those things, like most SW products, escalate in value over time. Not cheap.