As they say on Batuu... Bright Suns, John!
Thanks for stopping by the Disney Parks Moms Panel with your great question. You are so fortunate to be one of the first few Guests to build a custom lightsaber in
Savi's Workshop in Black Spire Outpost. I know the experience is one you will never forget. I also hope you enjoyed your time amongst the smugglers, traders, Resistance fighters, droids, creatures, and members of the First Order in
Star Wars: Galaxy's Edge.
Savi's Workshop really lets you create a unique lightsaber that is truly your own since you can customize it in so many ways. I did check directly with the Disneyland Resort and unfortunately there is no engraving or personalization that can be added to your lightsaber in the parks. You may have luck looking outside the Resort at an engraver. You could also look into a custom vinyl sticker that can be put on your lightsaber. (Bonus points if it is in Aurebesh!) Remember you can always keep customizing your lightsaber by changing out your Kyber crystals as well. These can be purchased in
Dok-Ondar's Den of Antiquities.
Personalization is offered on so many other products that you can find in the Disneyland Resort. Towels, hats, blankets, shirts, bags, and so much more can be embroidered at various merchandise locations between Disneyland Park and Disney California Adventure Park. Just check with these Cast Members to see if the item you purchase is able to be personalized. Also remember to always keep your receipt handy as you can only embroider items purchased in the parks with valid receipt.
I hope this helps, and please return if you have any other questions. 'Til the Spire!
-Jennifer