First off , I hope your son is responding positively to his treatment and that you and your wife are coping with the situation.
My 2 cents worth with your proposal would be to align yourself with people who have expertise in this field, such as Kerry Louderback-Wood ,who wrote an Article :"Jehovah`s Witnesses Blood Transfusions and The Tort Of Misrepresentation " in Medical Journals and has been active in giving presentations.
Also the work done by Bill Bowen `s site that highlights the inconsistency`s of the JW blood policy doctrine , rather than trying to start something on your own , add your support to some who have a bit of clout in what they do , and together you may accomplish more.
I wish you luck in whatever decision you make.
smiddy