Multichannel potentiostat circuit

I need a multichannel potentiostat circuit. It is essentially an analog switch to turn on or off drive voltage, and an op amp for current to voltage conversion. I was thinking Quad analog switch and 4 op amp chip. Total of 16 or 32 circuits. The PCB would need to interface with a D37 which drives TTL control of switches and a D37 which connects to my analog input +/- 10V, also an output connector which goes to our electrochemical cell. The cell has a matching number of electrodes say 16 or 32 and runs at a maximum of about 5 mA per electrode. current to voltage response of about 1 ms.

Thanks

EP