Can anyone identify these wheels?

[Diesirae]

I purchased a used 1999 Tahoe which has these wheels on it. The previous owner thought they were an after-market wheel. Can anyone identify these wheels as I would like to purchase an extra one for a spare? I've looked on countless wheel websites and can't find these wheels. They are 20" wheels.

[maxwedge]

take the wheel off and look for info on the inside.