The only way you'll get a morpheous pipe is if you buy one used as they are out of business now. I have a 75MAF on the end of mine with a 65mm t-body. I'm pretty sure my pipe is only 3" though...
Yes, that is probably the best way to do it that way there is no bends or turns in front of the MAF. Mine puts the MAF and filter in the inner fender and the bends occur AFTER the MAF so I don't get any issues with it being in front of it.