This Booster will satisfy your current needs. Indeed, it is a solution by independant "module" of 5A/20V. This limitation is four modules, so 20A/20V
It is a similar similar as the Multi-channels range (OrigaFlex). It has to be used with a base (called Drive Unit).

OrigaBoost - Current Booster

5A module solution:

 • Potentiostat
 • Galvanostat
 • 5A, 10A, 15A or 20A
 • Compliance: 20V

For more detail click here.!