Where do I get a wedding loan?

So, my fiancee and I are got engaged and I would love to have a nice wedding of my dreams. I'm looking to spend around $15 to $20,000 including the honeymoon. I only work part time and although my fiancee works full time, we still couldn't afford it especially since we have 2 kids. Is there any where I can apply for a wedding loan? I remember seeing a brochure somewhere a few years ago that specializes in only wedding loans but I don't remember the company. Anyone know? My credit is just ok. Suggestions?