You could also try to find the original Viper (solid), or the Pearl Viper. Those should have the same or similar core to the CPro. I had the Solid Viper, unfortunately it is cracked in half, I just picked up a Pearl Viper and can't wait to get it back from my driller to see how it works.
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Tsunami H2O
Super Carbide Bomb
Uranium
Cranberry
Teal Buzzsaw
Purple Buzzsaw
Ebonite Zebra 4