International Canine Semen Bank
http://www.ik9sb.com/Breeding_Supplies.asp

Note: What I found interesting is that ICBS offers and "Epi-Kit" that in the event you lose your stud to either accidental death or you must do an emergency neuter, they can harvest the semen from the testes and store it for you.

Please share links to websites other members might find helpful.

S_B