The pipes from Lars Ivarsson are not easy to find - that's a fact.
But from time to time, you can be lucky to find a few in the shops listed below:

USA:
Uptown's Smoke Shop,
3900 Hillsboro Road
Nashville, TN 37275,
telephone: 615.292.9576.

Switzerland
R.+ R. Wagner-Gerbig

Sweden:
Scandinavian Pipes, Sweden