Went to the NEC Bike Show this weekend. Unfortunately not only was there no sign of any Capos...there was no Aprilia stand fullstop. Very puzzling.
Anyway...there was a vendor there selling hard luggage and they acutally had capo solutions. The cases look pretty rugged and come in different sizes.
Check out www.metalmule.com for a pricelist and pics. Not sure how long they've been around but I've certainly never heard of them before.