Took my beautiful 135mm f/2 DC out for a spin today and I noticed a few specs of dirt between the elements and at least one spot of FUNGUS!!!!!!!

Where is the best place to have a lens cleaned and de-fungused?

I note the value of these lenses have gone up around 50% since I bought my second-hand copy - I hope it is cost effective to dismantle and clean. Anyone have an idea of the sort of cost?