Paco is correct, if you have the third row you have the nivomats.
rockauto.com sells the KYB Part # 345055 GR-2 / Excel-G
w/o 3rd Row Seating; Recommended OE Replacement; Rear $46.79
KYB Part # 554353 Gas-A-Just
w/o 3rd Row Seating; Rear $54.99
Per my research, Gas-a-Just are better and stiffer than the GR2 but both are recomended just for models w/o the 3rd row.
I don't know how packed or heavy you drive your XL7 or if you tow much but for the money I would replace the shocks with the ones above. $700 for a shock is plain stupid.
The nivomats are self contained and not electronically controlled, you shouldn't get any dash lights when replacing them.
How the XL7 has treated you in over 100k miles?
2005 GTO PBM M6
2007 Suzuki XL7 Luxury AWD
2006 Aprilia Scarabeo 500 GT ABS+
2007 Roadrunner Classic iscooter "Pinky"
2006 B&S 3.5 hp lawnmower