Were you using 2% Lugols in your solution or did mixing the 5% with SSKI somehow make it SSKI 2%? Sorry if these are stupid questions, I never had chemistry. (I guess I assumed if you were calling it SSKI 2% that it contained 2% Lugols; however, your message says to use 2 ounces SSKI with 5% lugols, so now I am confused.)
Anyway, I was wondering if it would be feasible for you, cost-wise, to use 2% Lugols from J Crow since there doesn't seem to be a limit on the amount you can get of the 2%.