Looks like you just need to take the shroud off the back of the clocks ...
and wiggle the lampholder out - they're rubber push-fit jobbies.
lamp #13 is 12V, 1.7 Watt T10. I think (don't quote me) that T10 means it's 10mm dia.
are 12v, 3 Watt 9.5mm dia.
Any car spares emporium should have them