You could bring the lens to some shops in Peninsular/Aldephi and ask how much it cost to clean it up.
Do bear in mind that after cleaning, some of the lens elements might loose the coatings. Then, the lens performance might be somewhat affected.
I have the first 28-70mm f/2.6-2.8 AT-X Pro lens which is fixed to F70 camera and only recently did I take a serious look at it. The lens have fungus owing to neglect. Could any bro recommend a shop for servicing please? Or should I send it to CP? Thanks.