Odd part for an XJ...

Found this while throwing semirandom numbers at a parts catalogue to see what popped up: 56008727, lumbar switch. Anyone know if this is actually an XJ part? I'm leaning towards ZJ/WJ myself but would be interested to hear if XJs ever came with an adjustable lumbar support.

Don't know if it is the same part at all, but on my '90 there is a lever on the side of the seatback that, when lifted, allows the upper half of the seatback to pivot... Definitely feel a difference in the lower back.