Hi guys, it appears that the brand is "sisco", but I couldn't find any model information. Here are pictures of the faucet from the top. It's loose now since I loosened it a bit from below. I just bought a basin wrench so hopefully I'll be able to remove it completely tonight and look inside the faucet.

I bought the basin wrench and finished taking the faucet apart. It appears that the leak may have been from a gasket that was started to crack a bit. As you can see in this picture, once the bolt is taken off (the one at the bottom of massplumber2008's picture), there's a second gasket that can crack, and make it appear that the water was coming from that hole. Once I removed that bolt and took off the large piece that breaks off the hot and cold, I can see where the leak may be happening. I also took a Q-tip and put it into that tube and didn't see any water, so I'm pretty sure it's the gasket. I'll keep you guys updated. Thanks for the help!

Here's the picture mentioned below

Very curious... don't think I have seen a washer setup like that! What next?

I went to Lowe's and home depot, and unfortunately neither had the washer. I guess the only option is to replace both faucets. This will be an expensive repair

You may be able to make your own washer out of NEOPRENE RUBBER SHEETING (available as 12"x12" sheet @ plumbing supply store)... or maybe you could purchase a little GRAPHITE ROPE and make a packing washer that way..? Just some last thoughts if you haven't ripped the other faucet out yet!

Mark

Thanks! I'll definitely try that. I'd much rather spend <$20 than several hundred on new faucets.

Keep me posted!