Please provide your own banner.
If you require banner design service, we can make for you a simple one like ones shown below for a small fee of $36 per banner.

Option A (Half Banner ad 300 x 60 pixels, up to 25kb)

Option B (Medium Rectangle ad 300 x 250 pixels, up to 35kb)
      

Option C (Button ad 125x125 or 125 x 90 pixels, up to 20kb)