It's remotely possible that the sour candies are causing trouble, but the amount of sugar per candy is quite small. More likely the Cipro/Flagyl combination is becoming less effective (I'm on the same combination, and I'm not looking forward to the day it stops working). Have you tried other pouchitis antibiotics (e.g. Xifaxan, Tindamax, Augmentin)? If you've got lots of gas it could be SIBO - mine was treated with doxycycline.
The VSL has a lot of active ingredient, which most probiotics on the phamacy shelf do not. In any case, the price for 30 sachets from the manufacturer is about $88 (https://shop.vsl3.com/vsl3-c2.aspx). If it makes you feel better, I just picked up my month's supply of the prescription-only double-strength (VSL #3 DS) for $610. Since (for now) my insurance covers it, the copay will be about $65.