Lurking in the Patreon Folder is a new subfolder called d20 Modern. In there you will find a PDF of d20 Solo.
These are my rules for d20Modern [Wizards of the Coast]. You will recognise soem bits from One Gold Coin, a couple of weeks ago. It uses a virtually identical set of oracle/muse tables.
Most of the effort in this booklet went into scene building and adventure buildings.
This booklet should be released later today, and at that point I will be able to add the link to the Back Catalogue page.