You should definitely go for it. The Lanboy and Chieftec Dragons are very iconic if you've been around a long time. Older cases are fun to work on. They are great for projects since most of them have been forgotten, so seeing one pop up again is a nice refreshment (some people may even think it's a new case). Many of the older Lian Li and Silverstone cases have a timeless design. I'd be really interested to see what you go with if you find an older case. Your style matches my taste very well.
It feels awkward being the only one posting here recently. Posts about modding in general are welcome, and I wish more people would post mod stuff that they love here. It doesn't have to be your own mods either you guys. I think posting mods that you like is a good contribution to threads like this. Since it exposes the rest of us to ideas we may end up using. The hardest part is coming up with an idea then sticking with it so you don't end up wasting time and money. Build threads and modding threads are where those ideas/inspiration come from. If I didn't spend time looking at other people's builds and photos, I'd never have come up with my own. Seeing other people's work lets you know what works, and what looks good.
For example, Japanese computer cases are an influence for my builds. Soldam/WinDy was an aluminum case manufacturer from Japan that rivaled Lian Li in the aluminum market. Unfortunately there was almost nobody outside of Japan with Soldam cases. A lot of us tried, but it was just a hassle. This case in particular played a part in the chocolate brown color I chose for my Stacker build.
Aluminum build, and anodized interiors.
Soldam went out of business a while back. Which sucks. However, some people consider the Japanese brand Abee to be their spiritual successor.
Abee does a thing with bolting on ID plates on the back of their cases, which adds a more premium feel.
In fact, to show just how much Abee influenced me, here was the first ID plate iteration on my last build. Complete with a play on the Abee name. Even used the same font. Shame on me.
If anyone wants to step up to making their own custom parts, then it does not get any better than Autodesk's Fusion 360. Includes built in CAM software if you want to go all out and have your parts CNC milled. You can export formats directly supported by 3D printing, and you can save drawings as DXF for easy export to Illustrator, for 2D/laser cutting. Components and hardware can also be imported directly into Fusion 360 from many manufacturers. So instead of modelling an M3 bolt, just insert the part from McMaster. You can even get quotes from companies like Protolabs. The best part is Fusion 360 is free for hobbyists. It's essentially professional CAD software that closely matches Solidworks or Autodesks own Inventor.
Fusion is what I've been using for my projects. This simple GPU mounting bracket was created in Fusion before exporting to Illustrator and sending them out for laser cutting.