We have a sale on this month for dual monitor stands (stands only). The model is the AOC AM420. They have a clamp attachment to your desk and are suitable for monitors with vesa mounts 100x100mm or 75x75mm (most standard monitors have these). They will take monitors from 17" to 34" (your monitors are probably 24"; monitor size is measured diagonally across the screen).
Our Price: $120
Notes:
Price includes GST
Sale price available until the end of July, while stocks last
RRP for this model is $199