As I know someone else could do a better job then me of doing Blender to Unity esque stuff but might as well share my take of the VRC Port of this Melanie as it doesn't look bad to me through PC but unsure about Quest as it's most likely broken but hell if i know.
Download Link (workupload.com)
Here's the folder for all of them, the stella's my custom one since I only got her as an FBX but if you know unity you can change her expressions so they aren't that easy to trigger.
Download Link (workupload.com)
I know someone who could, but she already has a lot of requests to make models into VRC compatible.
You could always try asking her.
She goes by: ALilRotten
On here.
Download Link (workupload.com)
Download Link (workupload.com)
Download Link (workupload.com)
https://transfer.it/t/XvHtzTon1bjR
avatar files I got before the post was taken down, and other files i found