I've briefly owned two devices: the Alcatraz and CB-X The Curve

This one I did manage to get on a couple of times, because of the open design of the cage, but the cage portion can not contain the whole of me when flaccid, so the ring is somewhere along my shaft and pulls my balls forward. It's too narrow as well, and it looks rather funny the way my skin is protruding outside the openings in the cage. The base ring is too narrow too. When I get turned on in this thing, it tries to tear my balls off because of the forward pulling, and it hurts like a motherfucker (not sexy).

This one claims it's for the bigger male. After numerous attempts to put it on I've given up. The cage is too narrow for me to fit in. I've tried it all, icing down, lube, the pantyhose method... All to no effect. The largest ring fits me just fine, but I'd need a wider cage (length-wise it would do I reckon).
So my logical question is: Apart from super-expensive custom metal devices, what's the largest male chastity device you know in terms of cage and ring diameter? All help is very much appreciated.
Thank you