Changing scales is easy, they just pop the heads of the rivets, apply a dot of superglue on the new ones and its done. You can find scales on eBay or similar. Multitool . org has a forum with guys that mod SAKs (I had two done by members there). You could reach out there and they could get you on the right track.
I had a set of mine engraved, but they weren't color filled. This was 12 years ago and a guy from Australia did it for me through one of the forums I was in.
I know Smoky Mountain Knifeworks offers engraving, maybe reach out to them, since they do it in house.
I know some of the Alox SAKS have an engraving panel on them. The Cadet comes to mind, and I you can get it in green scales, then the engraving would be silver.
Also check out this: https://www.swissknifeshop.com/collections/swiss-army-knife-engraving-favorites
I don't know if they engrave the blade or the scales.
I had a set of mine engraved, but they weren't color filled. This was 12 years ago and a guy from Australia did it for me through one of the forums I was in.
I know Smoky Mountain Knifeworks offers engraving, maybe reach out to them, since they do it in house.
I know some of the Alox SAKS have an engraving panel on them. The Cadet comes to mind, and I you can get it in green scales, then the engraving would be silver.
Also check out this: https://www.swissknifeshop.com/collections/swiss-army-knife-engraving-favorites
I don't know if they engrave the blade or the scales.