Contact another tuner, use the data logging feature of the X4 to send them what they need, and upload their tune. I know BAMA helped me understanding exactly what was in the tune on my car. Give them a call.
I used Leatherseats.com in my 350Z years ago and 2014 GT. In cars the old covers came off (after cutting hog rings) and the new ones slid right on and got hog ringed down. Time consuming, but a pretty easy job. When it comes time to replace another I would go to them again. The smell was worth...
It's a 96 vert. 77K. It's got the usual mods: gears, tune, springs, exhaust, clutch/shifter, wheels/tires, and hood. Paint is original and there is not a hint of rust anywhere. Got it from a real nice guy and mustang enthusiast. She looks like she has been someones garage baby her whole life...