That's frustrating. I guess I should have bought some last year when they were in stock and I didn't think I needed any.
My local store still has one in stock if you're interested - I know they ship as well. I believe it's $22.99 maybe? Google "Blue Ox Games".
I'm surprised our newer players didn't scoop them up. He has a Sphere and two Xindi Weapon Zeros in stock too.