Nope. Only one "Silver Monarch" deck - White box with silver foil, and white cards with black design inside.
We did a "Gold Monarch" decks that had a gold box, I think that is what you are remembering.
There are two versions of the White Monarch deck. The original is really hard to find, and you rarely ever see them available. They were limited edition and we didn't let them go easy. The Silver Monarchs were created to be an easy-to-access white colored Monarch deck (since the White Monarchs were limited and hard to come by). They lasted for a long while before we discontinued them.
Later came the "White Gold Monarchs", which were essentially a 2nd Edition White Monarch deck. These are what you see more often than not. They too were limited, but these days you see them more frequently than Silver Monarchs simply because they are far more recent. Silver Monarchs have been out of stock for several years now, while White Gold Monarchs were a more recent creation. There are far more Silver Monarchs out there, they are just all locked up in collections.
Best source? Probably eBay. Take your time, you will find them occasionally at reasonable prices. There is ALWAYS someone squatting on eBay putting semi-rare decks up at crazy high prices, hoping that someone who REALLY wants a deck will see it, assume that is the going price, and buy one. Wait and watch, you will learn what the real going rate is and you can make your move.
// L