in need of PC gamers’ help! custom keycaps as a christmas gift?

hi everyone!

i’m hoping to surprise my boyfriend for christmas with a custom illustrated keycap set featuring my own artwork inspired by his interests (cyberpunk 2077 is the current inspo - see the pic attached! but ideally i want to draw my own).

he currently has a logitech G815, which he absolutely loves. i’m not very knowledgeable about gaming hardware, so i’m trying to figure out whether this project is actually feasible.

ideally, i’d love to keep his existing keyboard and just replace the keycaps, but i’m open to getting him a new keyboard if necessary. my biggest concern is accidentally replacing something he loves with something that doesn’t have the same functionality or gaming performance.

a few questions:
- is it possible to have a fully custom illustrated keycap set manufactured from my own artwork?
is the G815 compatible with custom keycaps, or would i need a different keyboard?
- if a replacement is necessary, are there keyboards with comparable features that support standard customizable keycaps?
- has anyone undertaken a project like this before? i’d love to hear about your experience!

thank you so much!! i’m a little out of my depth here but really excited about the idea :)

If anyone in the r/keycaps community can help, I'd really appreciate it!