The PT04 is an OEM product from China and is marketed as various brands, but it is still the same thing.
Recently, I saw Artworkphoto selling a new version of the PT04, version 3, and it has a very good design to it, as you can see in the picture. By making the device flatter, the flash that sits on it would not be farther from the center of an umbrella. They have also placed a simple umbrella holder at the side, which now opens up new possibilities.
I personally like this design, but is still unsure of the reliability. I used to have a pair of them and they were not very reliable. I wonder if this new version would be improved.
Here is the link to Artworkphoto's page of the PT04 III.