On Sun, 25 Mar 2007 12:40:30 -0500, "Sean Inglis" wrote:

Is there anyone who manufactures a hardwood surface with a built-in
upstand, with a gently curved corner, rather than a right-angle and some
perishable sealant?

Make your own. 1/2" router, skate jig and a tray cutter. Order the
worktop timber a bit over-thickness and take height of the upstand off
the top surface everywhere else.