If you're interested in making your own sgian dubh, there's a company called Atlanta Cutlery (they're on the web) that used to sell damascus blades for sgian dubhs and dirks (don't know if they still do). If you wanted to go with the antler handle, check out some of the antique shops. I saw a rack in one recently for $15. The handle blanks through knife supply shops can be costly.

Cheers,

TJ