In Canada, you can buy Beyblade: Metal Fusion at Walmart and Toys 'R' Us.
Hasbro has released these Beyblade: Metal Fusion products so far:
Storm Pegasus
Dark Wolf
Dark Bull
Rock Leone
Dark Gasher
Storm Aquario
Rock Aries
2 Electronic Beyblades (Storm Pegasus & Dark Wolf)
Faceoff Set: Lion Gale Force Wall [Rock Leone & Flame Bull]
Faceoff Set: Pegasus Tornado Wing Attack [Storm Pegasus & Rock Aquario]
Faceoff Set: Darkness Howling Blazer [Dark Wolf & Storm Aries]
Launcher Grip
String Launcher
Pegasus Thunderwhip Beystadium (Blue & Yellow)
Hasbro has not released Flame Sagittario yet. It is in the next wave of releases.
As far as we know, Hasbro will only be releasing the Hybrid Wheel System Beyblades and will not be releasing the Metal System Beyblades.
This should have been asked in the 'Ask a question, get an answer' thread in the Beyblade General forum.