The Herman Miller Jarvis was previously the Fully Jarvis. For more information on the change see this blog post and for more information on the Fully Jarvis frame, visit the Fully product page.
Herman Miller Jarvis is the entry level sit/stand frame from the brand. They are well reviewed, but as of the time of writing do not offer a frame only purchasing option (unlike previously under the Fully brand).
A solid wood top can be easily fitted to a Herman Miller Jarvis using wood screws.
How to fit a desk top (without pre-drilled holes) to a desk frame
Is drilling pilot holes required when attaching a solid wood table top to a desk frame with wood screws?