Too true, though that is the reason I said consult with your DM. In my mind (but maybe not the mind of YOUR DM) dragonscale armor is not "magical". The reason I say this is because dragonscales their self are not "magical" persay, they are just very hard and resistant to the type of damage the dragon uses. Even knowing in the DMG it is considered a "magical item", I think it is just there because there is no better place to put it. When I made my first post I was thinking that the person who was going to make the dragonscale armor might be able to cast fabricate himself OR ask a friend to do it for him as a favor.
There are a lot of backgrounds that allow you to become proficient with a particular tool so if you plan in advance to use fabricate as a business, it should not be that hard. Also, if you are willing to spend some gold and around 100 downtime you could learn to use a new tool. As I said in my first post, consult with your DM and no other because your DM is going to be running for you and their thought on the idea is all that matters.
(is this a necro post?)