they're called zoos.. Here in the US, the komodos are incorporated into a studbook, in which each and every animal is logged and accounted for...Not to mention that they are CITES I, and would be very difficult/impossible to be able to legally own one.. I also believe that komodo propagation has been halted for the time being, as there are not enough zoos that could properly accomodate such a large animal, and you think that you could care for one at your house???ha!
The only way I see somebody keeping a Komodo in a private collection, is if it is smuggled into this country, and if that be the case, I hope you enjoy your 20 year stay in federal prison...
Leave the komodos for the zoos, who have the proper conditions/facilities/knowledgeable staff/veterinary services/funding to take care of such a beast... If you want a big monitor, get a salvator.... I believe the record for the largest monitor lizard ever recorded was a Water Monitor...
If you are just curious as to their behaviors and such in captivity, I recommend checking out the book Trooper Walsch co-authored about Komodo's...can't remember the name...or, you can try contacting the herpetology departments of the few zoos here in the states, or abroad, that do in fact keep them..
cheers,
bob