Good morning Stephen,
Below is information on the air seat options for the 99 and newer Ford Superduty trucks. These bases are made to be used along with National seats. Using non-National products will require fabrication/modification. Most customers that use non-National seats along with the bases encounter a height and/or valve issue. If you have integrated seat-belts, you would need to contact your ford dealer to have the seat-belt assembly changed to one that connects to the pillar or into the ceiling of the cab.
For a complete set up, you would need a seat, air base, and compressor (only one needed for two seats, if there not an air source on-board). You can also add inner armrests to either the driver or passenger side seats. The seats below can also be used with a static base for 99.41.
Option 1
Custom Leather Truck Seats
-Leather Sportster
Seat: 797.02
Armrest: 88.41
Suspension: 226.99
Compressor: 288.81
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Option 2
Deluxe Air Ride Seats for 1999 1/2 Ford Trucks
-Fabric Sportster
Seat: 584.48
Armrest: 63.04
Suspension: 226.99
Compressor: 288.81
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Option 3
Truck Bucket Seats
-Workhorse ( in vinyl or fabric)
Seat: 348.32
Armrest: 53.04
Suspension: 226.99
Compressor: 288.81