It would be easy to connect a MAX7219 to 8 common-cathode 7-segment displays, 6 showing time & 2 showing lap count for instance.
H:MM:SSS, DD
Look at taydaelectronics (Thailand)for MAX7219, $1.25 each
If need larger digits there are other sources such as futurlec (Australia), 2.3", 3", 4", 5" available.
1.5-2 weeks for inexpensive shipping.