My backyard is infested with Creeping Charlie and want to act on it in next two weeks to ensure i have maximum impact. Am looking for triclopyr in weed b gon but unable to locate it any stores. Need following advice

1. Where could i locate the Weed B gon with triclopyr
2. Can I apply the above weeD g gon along with with Scott winterizer
3 When is the best time to apply both the above for Central NJ, is it first week of Sep or mid of Sep or last week of August
Thanks