You know what, offer someone who is good enough. And who's ok with that. We'll consider that person as an escrow holder. Seriously.
You can find a list of known escrows in this thread https://bitcointalksearch.org/topic/bitcointalk-escrows-trade-safely-855778.
Generally, any project that is looking for a crowdfunding has some kind of escrow. For instance, the crowdfunding platforms (like kickstarter or indiegogo) only charge the participants once the goal is reached, no matter how advanced the project is or how qualified the people involved in it are.