Lift Blocks aren't vehicle specific. Just get ones in the height you need, same width as the Leaf Spring, and with the Locating Pins in the proper size, and you're good to go.
Ha, this is one of the only ones I haven't seen have a Block from the Factory. Maybe it's a Package you got or something, that keeps it out.
Daystar or Zone (BDS) usually has the best prices on Lift Block and U-Bolt Kits.
Check to see if you have a Block back there from the Factory already, I bet you do. So you're gonna have to add onto that height, with ONE Block, DO NOT stack the Blocks.