Six boards left if someone has TIL311 display chips and 74hc595 latches to build this RETRO project. Free, if I am allowed to list you as a beta-tester on this Hackaday site,  just send your address, ( one per customer ),          :-)   

The way the 74hc595 latches work with the TIL311's is like this below :

                  //---------------------byte to control decimal points----------------------------
                      digitalWrite(latchPin, LOW);                            // set latch for data  
                      shiftOut(dataPin, clockPin, LSBFIRST, 219);   // blink decimals on
                      digitalWrite(latchPin, HIGH);                           // light up the leds
                   //-------------------------------------------------------------------------------------------
                   //-------------------------2 nibbles for minutes------------------------------------
                      digitalWrite(latchPin, LOW);                            // set latch for data 
                      shiftOut(dataPin, clockPin, LSBFIRST, mcount);// shift out the bits
                      digitalWrite(latchPin, HIGH);                           // light up the leds
                   //-------------------------------------------------------------------------------------------
                   //-------------------------2 nibbles for hours---------------------------------------
                      digitalWrite(latchPin, LOW);                            // set latch for data 
                      shiftOut(dataPin, clockPin, LSBFIRST, hcount);// shift out the bits
                      digitalWrite(latchPin, HIGH);                           // light up the leds
                   //-------------------------------------------------------------------------------------------