Does anyone know a source for the PDFs of the following 5e supplements:

1. The Book of Many Things
2. Vecna Eve of Ruin
3. Quests From The Infinite Staircase

I have checked the PDF Share trove, the 5e trove in the 5e thread OP, NV, and for kicks the OSR and NuSR, no hits or I'm blind.

Of course this material can be found on 5e Tools in markdown format, just for hoarding purposes I'm searching for PDF scans.