We just bought a radial head drifter from Lee Sails and while we're hardly experts, it seems very well made. It came completely rigged with a nice bag, a dousing sock, parrel beads and all the hardware. We only needed to add the sheets and downhaul lines. It works great and we're very happy with it.
If I recall correctly, they had the measurements already. If you're concerned, you should certainly measure yourself, as boats do vary, even production boats.
Also nice was that their price was just over half the other two quotes I got -- about CDN$1800.
Regards,
David Querbach
Aloha 32 #22, "China Girl"