IIR notch filter

I am trying to design a second order digital IIR band stop (notch) filter
with the following specs:

3dB cut off frequencies: 55Hz and 65Hz
I want the notch at 60Hz with atleast 90dB attenuation at the 60Hz.
Sampling frequency: 200hz

I tried various filter configurations like a Butterworth or Chebyshev but
could not get the attenuation higher than 70 dB.I want a second order
filter to accomplish this i.e I do not want to go to a higher order
filter.

Can someone suggest any possible solutions to this problem. Many thanks