Crap. Normally this is the part where I plug greatmodels.com, but they don't even have it listed anymore. I bought mine thru them and it took forever it seemed like before it got here.
Squadron.com got zero hits too.
Sprue Brothers site claims two in stock: http://spruebrothers.zoovy.com/product/DML3310 & I've purchased thru them before with no problems.
Here's one I found on eBay - from Singapore: http://cgi.ebay.com/Nam-1-35-OH-6A-Cayuse-w-crews-Helicopter-Attack-Chopper_W0QQitemZ5994196586QQcategoryZ2587QQssPageNameZWDVWQQrdZ1QQcmdZViewItem