Not the top part unfortunately. I believe there is a way to use a Dremel and cut holes for the transverter but it would require modifying the case.
Once the general purpose case comes out, I will look into designing one that can fit the transverter too.
Wonderful job on the case. I have one in my hands and it's top notch. Unfortunately, I'll be unable to use it now that I have an HF Upconverter. Any plans to make a new top part to support the converter?