crwdns2934241:0crwdne2934241:0 Dan

crwdns2934249:0crwdne2934249:0:

What you are looking for is a CAD drawing for the keycap.

Here's one you could alter to meet the Surface Book measures [https://grabcad.com/library/keycap-laptop-1|Keycap Laptop]

crwdns2915684:0crwdne2915684:0:

open