The only place I've found them is RackMountPro (http://www.rackmountpro.com/productpage.cfm?prodid=821) that actually seems interested in giving prices and says they are in stock.

Anyone know who else sells Appro?

I've done a great deal of business with Rackmountpro.com in the past... had a few shipping screw-ups, but other than that, they have been very good.