I read the 4 pillar book and created a diversified portfolio similar to one of the portfolios outlined in the book using mostly Vanguard funds. But even Vanguard does not offer funds for every asset class (such as international bonds). However a Vanguard brokerage account gives me access to non Vanguard funds that can be bought and sold wihout paying any fees and/or loads, so it should be quite easy to find what you need (plus off course you have access to any ETF you want if you cannot find a suitable fund). The cool thing about using Vanguard for most of my fund choices is that I can keep my portfolio's overall expense ratio low (0.37%) which can be challenging once you start investing in less conventional asset classes.
I don't know of any one fund replicating the "four pillar" portfolios.
47 years old, single, no kids. Exited the job market in 2010 (age 36). Have lived solely off my investments since 2015 (age 41). No pensions.
Current AA: real estate 64% / equities 10% / fixed income 16% / cash 10%