I bought IKlear directly in an Apple Store. Expensive, but wanted to be sure on this. Then I went to MANY stores (Sears, Home Depot, Lowe's) to find out they didn't carry any dry film lubricant, but were willing to send one through post-mail. I was in a hurry, and went to Ace as a final resource, and to my luck they had one left... Very inexpensive, about 4 dollars.
I am sure ANY $5 to $10 Lub brand in Amazon will do the trick. Just follow the instructions on the page I referred.
Regards.