As a second present to everyone, Centauri Spaceworks has released a holiday part pack with two new parts: Holiday Xmas Module and Holiday Hanukkah Module. Both parts pair nicely with the new Ion Drive part, but can be enjoyed with any of the existing parts.
Right now creating custom parts is a bit of a technical process. However if you want to give it a try, join the Station Designer Discord. You can find a link to the how-to there, as well as get any questions you may have answered.
Happy holidays and happy designing!