Go to HoosierTopics.com. It's kind of like Craigslist, click on the section for firearms.
Used to search indiana gun club when I wanted to dream between trips in there. But last time I checked their search wasnt working.
GB is still your best bet in the end for a decent 3913. You need to make sure you check the sellers rating and always use a USPS money order. If someone refuses a USPS money order then walk away.