I didn't really find any info about these LED displays on Pinside or the Zaccaria-Pinball.com site, so I figured I'd post up my experience and results.
I recently purchased a Magic Castle on a container buy, knowing that it was going to need two displays and a backglass. I figured that would be easy enough - Was I never more wrong. I tried to keep any eye out for a backglass and displays for a while, and nothing seemed to be available. Fortunately, I found Gianfri and his new LED displays for Gen 2 Zaccaria pins (Gen 1 kits are also available).
When I initially requested info from him, and he was extremely responsive and provided me with technical details on modifying my existing hardware to run his DYI LED display kit (29€ each). He also has a deluxe version (49€ each) that is a complete drop in replacement. Since I didn't mind doing the work myself, and had working display drivers, I opted for the DIY kit. Shipping was 25€ to Puyallup, WA USA. Made the purchase two weeks ago, and received my order last Friday.
I took a few pictures of what I received, me modding my display drivers and one with them running in Magic Castle. The mod does require that you remove / replacing several resistors, cut a few traces, run two jumpers and replace IC2. I did most of the work Sunday night, and finished up this evening. I'd say it was about 2 hours total work. While they visually look comparable to the originals, they're a little different and I think I'll replace the rest as well so that they match 100%.
Here's a link to one of their demo videos -
Gianfri asked that any product /sales inquires go to: email@example.com
Feel free to let me know if you have any questions!