When I had my RS-1's, the little end cap came off of one of the metal swivel posts. I asked Mr. Grado to kindly send me another, which he did and then some. In other words, I have one extra endcap.
The price, you ask? $0 if you have a set of RS-1's and *really* do need it (please, no ******** artists...this is a special piece we're talking about). Otherwise, it'll be $39.99, approximately on par with it's price-to-weight ratio per ounce on a pair of RS-1's.
I actually need one for my SR60's! I am concerned however, that
the improved sonic performance that will come with the new RS-1 endcap will create an unbearable left/right imbalance. I might consider your offer a little more seriously if you could offer me two endcaps
...yeah, that's a tricky one that I wouldn't want to mess with. Besides, to ship this big bastard to Oz would cost an arm and a leg. Really, I should have said it before: this offer open only to residents of the U.S. (unless you are taking advantage of the special, "I'm not qualitifed" introductory offer of only $39.99, in which case shipping will be only $4 more).