I'm looking to have custom styles developed for three of my forums. One of these is the forum for my business and it is fairly large (33,000 members). Because of this, I'd prefer to work with an actual company which carries insurance, can provide references, etc. rather than a person who could simply disappear, should something go wrong. Is there a directory somewhere of businesses which specialize in XenForo development? Any other best practices I should know about before hiring someone for these projects?