decobraman,
Are you tring to match the wheels you already have, but in a larger size or are you looking for a wheel in the style of the Crager 320 series?
If it is the later, then here is a site that has a model that appears to be close to the crager.
http://www.imagewheels.co.uk/.
Look at the billet Wheels # 46.
I am confident that they will be able to make almost any size wheel any way way you want it.
I have the GDTs on my Cobra. They are just a little different than the Halibrands.
Bud