Looking for <5mm diameter collimating lenses for 3.8mm green and blue laser diodes

[kirkg]

Looking for <5mm diameter collimating lenses for a 450nm blue and 520nm green 3.8mm laser diodes. For low power (~5mW). I have found 5mm diameter lenses but need something closer to 4mm or smaller. Coated glass preferred but take what I can get.

Thanks.