Got some wheel spacers for my Sportrak, 32mm.
Some interesting pointers, the wheels stud patterns are the same as Vitara, but not the actual stud thread, the Vit uses a M12 1.25mm thread, the Sportrak M12 1.5mm.
So if you buy Vit ones they wont fit.
They work by screwing stud extensions to your existing studs, then the spacer fits over them. There are hex shapes in the spacer for the tops of the extension studs so they cant come undone - they kind of lock together.
The 28mm studs on my Sportrak were about 2mm too long, so I had to shorten them so the extension studs fit flat to the hub. This was not an easy job but got the knack by the end!
Got mine from here -