55mW Viper lens replacement

Anybody know if and where I can aquire a suitable drop-in replacement collimating lens for a Dragonlasers Viper series? Mine came loose one day, I tried to glue it back on. For the most part it works but the lens has a burnt looking greenish-red spot on it and the end spot has streaks coming off of it.

Advice appreciated.

You can ask dragonlasers or CNI for this lens.