good luck, there's a lens kit available but the lenses are not for the ROAM/ROAM2, they fight tight against the CCD optical lens. The kit does have fittings to use camera filters if you can find them (28 & 32 mm). If you find ROAM lenses send me a PM, I'll buy 3.
on a side note, check out the firmware upgrade post
http://airsoftcanada.com/showthread.php?t=158619