Also see the links at the bottom of the short text.
Using the LPC2106 gets you very close. Differences are:
PWM timer on 2106 replaced with 2 16-bit timers on LPC2101
Fast ports not available in LPC2106
ADC not available in LPC2106
Nevertheless if your code runs on the LPC2138 you might want to start from that device and reduce it to match the LPC2101.