I'm guessing you're stuck, because you now have a set of used sport seats. I can't imagine anyone wanting to trade for the comfort seats that they ordered. Having said that, I wonder if your sport seats fit an E53? Perhaps you could simply sell them outright and then buy a set of comfort seats. At least that would offset the cost a bit for you. Maybe there's someone out there who would love to get a decent deal on a set of new E70 sport seats to replace their old E53 standard seats??? GL!

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'08 335i Coupe - Barbera Red / Saddle Leather / Light Poplar Wood / 6spd Manual
Options: Sport, Premium, Cold Weather, Comfort Access, Active Steering (awesome!), Power Rear Shade, IPod Adapter, Navigation w/IDrive
Mods: M6 Wheels, Split Armrest, M-Steering Wheel, Euro Light Switch w/Rear Fog Lights, Short Shift Knob w/Matching E-Brake Handle, Clear Reflectors, CDV, Clear Bra

Retired:'04 X5 4.4i