I think it was this one:
https://www.google.com/maps/place/St...2!4d-89.395092
A friend of mine who is a hardcore thrift shopper would know for sure.
I can't say I'm very familiar with the thrifts in Madison. I've only been on thrift runs there a couple of times.
The Goodwills I typically hit are Pewaukee (very close to me), Waukesha, and a few other near by.