Cedric:
Does the RAM need to be fast access?? For 60 bytes of RAM with low band width requirement you may consider using an I2C device that has on-board serially accessed RAM. There are various devices of this ilk around. Here is one example chip - Philips PCF8583.

This device offers 240 bytes of RAM and would take but two pins to connect to your microcontroller.

Previous threads on this forum have also talked about using another cheap 8051 controller with dedicated flash based program to provide the RAM via either a parallel port interface or via some find of
serial interface. could even use the UARTs.

Michael Karas