They are rare, but I've found some.
I've mentioned Nomadic Ministry on this blog before. I have also now found two other sites.
The Spiritual Solider
Hope To The End
I also found a video on YouTube supporting a form of Mid-Trib Rapture.
Daniel's 70th Week - According to Revelation
All three sites have things I disagree with them on, not just on other eschatology issues but also how to define a Mid-Seventieth Week Rapture. The Youtube video makes mistakes on Revelation chronology common to Post-Trib and Pre-Wrath.
There is a tendency to confuse Mid-Trib and Pre-Wrath, so I had to par careful attention to make sure these two sites weren't doing that.
Still, it's important since I believe this view is the correct timing and yet is the least popular that we make an effort to support each others.