If you need a source for new ones in stock, there are a few on Gunsamerica matching your needs. First Stop gun (Mark) is a great guy to deal with. There is an Excalibur and a Jackson Excalibur in stock currently.
And, there is a good price on a used one with fluted barrel currently on Gunbroker.com
Last edited by KenMi; 05/12/16.