-- Last Updated: Jan-31-13 11:17 AM EST --
Colden, Hornbeck, Placid, Savage River and Swift all offer synthetic rail construction. There are others working on it, witness recent entries in MCCR.
Savage has hull shapes nearer to the Prism, but Colden, Hornbeck and Placid also have long & fast Swede form tourers. Placid's Rapid is a better choice than Shadow, which is significantly narrower/ faster/ more challenging to keep upright.