Are there any .58 caliber traditional rifle build-em-yourself kits with non-adjustable non-glow sights available in the market? Cabelas no longer sells the .58 but still has the .45, .50, and .54.

Namibiahunter

You might contact the folks at http://www.longrifles-pr.com/ and see what they might offer.

or Track of the Wolf... TOTW kit

A T/C Hawken kit in .54, then order a drop in bble from Green Mountain in .58 or .62. Cut a dove tail for your rear sight. That should fix you up.

Try these folks. They are great to deal with and have one of the best muzzle loading shops on the left coast.

http://thegunworks.com/

Good luck.