I have a bit of advice. I have the stock D90 seat, but I was worried because there is no neck/head support in case of a collision. So I bought a pair of gray Range Rover headrests from Will Tillery and had a local shop weld brackets to mount them. The look is factory, even though the shades of gray a little different.
The place that did it is UrbanOffroad and their contact info is at http://www.urbanoffroad.us