I have an answer for you. Coincidentally, I also got my idealized pack a few weeks ago, and I just made and ordered a mother board for it from SendCutSend. I can send my .dxf file, but I am not 100% sure it will fit your pack. My recommendation would be to make your own custom board.
I can also say for a fact that the Q pack motherbaord absolutely does not fit. I had the same thought as you, it is close but off in almost every dimension, overhanging the shell in some places and being almost a half inch short in others, particularly around the cyclotron area. Below is a picture of my original trace and dxf file.
This is a picture of my board. The Q pack is in red for comparison