Cases w/ Knockouts Up-To 10 I/O Ports?

SpdyVkng asks: "Once, I worried if I ever would have the money to buy a significant number of expansion cards for my PC; then I worried about the number of slots available; now most cards I have in my computer use not only one back end, but two (or more in some cases), for their I/O needs. That has me worrying about the cases I can use: 7 knock outs for expansion cards are too few, since I really would need someting like 9 or 10. To make it perfectly clear, I don't need more than 6 PCI slots on the mother board, and an AGP, but I need more physical knock outs in the case to have access to the extra I/O ports I need and which every card seems to have these days." Of course, necessity being the mother of all invention, how difficult would it be to "adapt" some off-the-shelf cases with added ports? I would figure that an adept person with the right tools might be able to add in side and front ports, depending on the case. Are there any places out there that will custom make chassis with these and other modifications?

"My computer is used for audio edting and I need all those extra audio channels and SCSI connectors for my external equipment. Unfortunately these audio cards and scsi cards take two or three PCI places, while only utilizing one or less slots on the motherboard.

Anyone who knows of cases which can accomodate more backends than seven?"