Yours appears to have the 14" limbs which I think are available yet. You cannot update to the Cat/Cat II, or Nitro cams as these require the newer 13" reinforced limbs. As it is you have the older, discontinued Nitrous cams, which in many peoples' opinions including mine, are one of the best cams systems ever developed. It would serve no useful purpose to try to put any of the newer cam systems on your bow as there would be little if any speed gain, and the cost would be unrealistic anyway.
My suggestion would be to just be happy with the bow as is. Maybe, when necessary upgrade to a good set of custom strings made out of BCY Trophy. These can be had from many of the custom string makers on Archery Talk, such as Vapor Trail, H&M, and others. Maybe change out the VEM's in the riser for the newer ones.
If You're Not Living on the Edge You're Taking Up Too Much Space
Martin/Rytera Staff Shooter
PSAA Life member, UBP Life member
PADI AOW Diver