What ended up getting the spots off the film was running a sponge dampened with distilled water across the base side of the film. Rewashing and restabilizing without wiping the film with a sponge just resulted in spots again, I'm never using that crap stabilizer again.
I purchased kodak final rinse to replace the unicolor stabilizer, its a 45ml bottle to make 5 liters. Is it correct that if I want to make a working solution of 500ml I should add 4.5ml of the final rinse concentrate? And about how many times could I use that working solution?