Good advice from all here on where to look for such help -

As an aside, just because it is something that needs to be part of your tangential planning. Do know that ever since the Minneapolis collapse few carriers (you can count them on one hand - your current insurer is not likely to be one of them) will write GL policies for those doing bridge work, and you will pay a larger premium for the privilege, and there is no walking away from it once it is part of the record. The way they look at it, even your past work carries a potential liability should something someday go sideways and the lawsuits were to start flying.

Just a heads up that you would / should need to build that future cost even into a one off effort.