1) Karda
The khukuri is traditionally* furnished with a leather covered wooden scabbard holding two by-knives, the karda and chakma(k). The karda is an edged knife usually about the length of the kukuri's handle. The chakma(k) is the same length but is a tempered steel to burnish the khukuri with like a butcher's steel, or to strike sparks off flint to start a fire.
* In rural Nepal, this seldom happens. The people don't have the extra money for scabbard or the karda and chakma. These khukuris are partial tanged, i.e.,
the blade and tang are forged and then the tang is burned into the handle, later to be reset into the now ready handle after hardening, this time using laha ( cutler's resin ) or plastic. These are partial tanged and do not extend through the handle.
2) Pesh-Kabz
Simplest way is to look up Custom Knifemaker Bud Nealy who makes Americanized versions of these blades. The other is to look up Oriental Arms, a company in Israel run by two brothers, I believe.
3) Shah Jahans (Jahan's) is linked to on the Oriental Arms link page. A fellow HI forumite whose name escapes me bought the business from the former owner say six months or more back.
The "Shah Jahan" was a 17th century Mughal ( whence came the term for Hollywood film moguls came from ) dynastic king to whom the Taj Mahal is attributed as having built.
4) Kard - got me beat there. Try Sword Forum International.
