While these beautiful vintage displays (both the red ALS314 and the lime-green AL304V) are quite rare, a few builders have asked where to find them to build their own TinyNumberHat 9
I found a eBay seller who currently has stock of these New Old Stock (NOS) parts.
If you want to grab some for your parts bin or to complete this build, you can check out their listing here: ALS314,  AL304