Check e-bay for it, though and you should be able to get a decent deal from South America -- this one would be about $45 with shipping.
http://cgi.ebay.co.uk/SOFT-WARM-YEL...hash=item160319678082&_trksid=p3286.m63.l1177
A word of caution though -- if it doesn't say %100 Alpaca (the listing above doesn't) the odds are it's alpaca and wool. Don't get me wrong, I LOVE wool -- but alpaca-wool blends don't give you the lightness of pure alpaca.
Just emailed the vendor and its 50% alpaca, 30% wool sheep 20% acrylic. Would probaby have gone for a 50:50 alpaca:wool, but not keen on the acrylic, but I assume this makes it more robust.
Graham