CSUSA's Artisian Executive is close, may be slightly larger or slightly smaller. it's been a while since I've had one in person... The Artisian Signature Fountain Pen is close also...
Like the Sedona/Barron, the Berea Reinhart and Virage are the same tubes, and roughly the same size, and their New Series Style is a bit smaller... Not sure if Berea still sells it, but Woodcraft used to have a Classic American Fountain Pen that was significantly smaller.
PSI has the Classic Elite and Traditional that are smaller, and the Tycoon I believe is the same size tubes.
The Magnetic Vertex, Magentic Graduate, Presimo, and Big Ben are close also.
I'm sure some of the other vendors have similar size kits also that may just have different centerband/clip combinations...