i emailed customer service, and noted the fact that their prior listing said "lockring included," and here is their response:

"We have taken your address information and will be sending a lock ring to you. The lock ring, however, is not an item we currently stock, so we are need to special order this from one of our vendors. I will see that this part is ordered on Monday, December 12 and we will ship it to you as soon as it arrives."

i'm cool with that.