They're about 8" tall, and maybe 6" wide at the shoulders? If you find suitable bitz, I'd be all for it. There are a few companies that make models of similar size and shape, but they're still over $100, so not very good for my purposes. They fit on a chariot base, from GW. Maybe a flying base? The base is about 6" long and 4" wide, and the Knight fills it pretty well.
At this point, If I could find a Transformer of the right size, that I could glue in place [Oh beslubber! It's the Kraggle!] and then prime, I'd be all over it.