I don't know if he ever plans on releasing the stuff officially, but I see he has it on Soundcloud. With everything that's happened over time, and the passing of Maniak, I don't know whats gonna happen. This is all post - China's Cabinet era by a decade and some. Recorded w/him between 2013-2015.
https://soundcloud.com/filthyphil209/watch-ya-step-2015-remix
https://soundcloud.com/filthyphil209/street-star
https://soundcloud.com/filthyphil209/if-u-got-it
https://soundcloud.com/filthyphil209/i-want-thangs-filthy-phil
https://soundcloud.com/filthyphil209/i-dont-know-about-you
https://soundcloud.com/filthyphil209/breaka-breaka
https://soundcloud.com/filthyphil209/watch-ya-step-2015-remix
https://soundcloud.com/filthyphil209/street-star
https://soundcloud.com/filthyphil209/if-u-got-it
https://soundcloud.com/filthyphil209/i-want-thangs-filthy-phil
https://soundcloud.com/filthyphil209/i-dont-know-about-you
https://soundcloud.com/filthyphil209/breaka-breaka