Your search for "wheel spacers" revealed the following:
OTTKIT12 Camso OTT Kit Without Strap, Over The Tire Rubber Track Link Kit, Tire Size 12-16.5
$ 548.00
OTTKIT10 Camso OTT Kit Without Strap, Over The Tire Rubber Track Link Kit, Tire Size 10-16.5
$ 488.00
Set (Pair) 12" Grouser Hard Tracks Steel OTT Tracks, For New Holland L220, L320, L221, L321 (12-16.5 Tires)
$ 4,200.00
Set (Pair) 12" Grouser BarTrack™ Steel OTT Tracks For 12-16.5 Tires (Bobcat, Cat, Deere, Hyundai, Kubota, New Holland) (Copy)
$ 3,400.00
Set (Pair) 12" Grouser BarTrack™ Steel OTT Tracks For 12-16.5 Tires (Bobcat, Cat, Deere, Hyundai, Kubota, New Holland)
$ 3,990.00
Set (Pair) 12" (12-16.5) Grouser Hard Tracks Steel OTT Tracks, Deere, Hyundai, Kubota, Kioti, Wacker Neuson
$ 4,200.00
Set (Pair) 12" Grouser BarTrack™ Steel OTT Tracks For 12-16.5 Tires (Case, New Holland, Wacker-Nueson)
$ 4,200.00
Set (Pair) 10" (10-16.5) Grouser Hard Tracks Steel OTT Tracks, For Bobcat, Cat, Gehl, Deere, NH, Mustang, Wacker, 13238FH-2
$ 3,598.00
Set (Pair) 12" (12-16.5) Grouser Hard Tracks Steel OTT Tracks, ASV, Bobcat, Cat, Gehl, John Deere, New Holland, Wacker-Neuson
$ 4,400.00
Set (Pair) 10" (10-16.5) Grouser Soft Track® OTT Tracks, For Bobcat, Case, John Deere, Kubota, Wacker, New Holland
$ 5,748.00
Set (Pair) 10" (10-16.5) Grouser Hard Tracks Steel OTT Tracks, For ASV, Bobcat, Case, Deere, 13238FH-6
$ 3,598.00
Set (Pair) 12" Grouser BarTrack™ Steel OTT Tracks For 12-16.5 Tires (Bobcat, Cat, Deere, Hyundai, Kubota, New Holland)
$ 3,990.00
Set (Pair) 12" Grouser BarTrack™ Steel OTT Tracks For 12-16.5 Tires (Bobcat, Cat, Deere, Hyundai, Kubota, New Holland)
$ 3,990.00
Set (Pair) 10" (10-16.5) Grouser Hard Tracks Steel OTT Tracks, For Bobcat 743/753, S130, Case 1835/B, SR130, 13236FH-10
$ 3,420.00
Set (Pair) 10" Grouser BarTrack™ Steel OTT Tracks For 10-16.5 Tires (Case, Gehl, John Deere, Manitou, Mustang, New Holland)
$ 3,200.00
Set (Pair) 12" (12-16.5) Grouser Hard Tracks Steel OTT Tracks, ASV, Bobcat, Cat, Gehl, John Deere, New Holland, Wacker-Neuson
$ 4,388.00
Set (Pair) 10" Grouser Hard Tracks Steel OTT Tracks, For New Holland L218/L318, Kubota SSV65, 10-16.5 Tires 13240FH-6
$ 3,800.00
13.2F12S58 Loegering F Series Trailblazer Over The Tire (OTT) Steel Tracks, 14-17.5 Tires
$ 8,536.00
Set (Pair) 12" Grouser BarTrack™ Steel OTT Tracks For 12-16.5 Tires (Case 1845C w/12-16.5)
$ 3,780.00
12.5F10S56 Pair Of Loegering F Series Trailblazer Over The Tire (OTT) Steel Tracks, 12X16.5 Tires
$ 7,199.00