Help with cholesterol that keeps rising

anyone with a suggestion, please advise.  45 year old brother in law that has had a heart attack and some TIA's is on 3 cholesterol meds (non statin) and his bad cholestrol has still risen to over 370.  He can not take statins as when he was on them previously he almost died when his kidneys shut down.  His body is producing too much cholesterol and the only thing they are recommending now is a procedure like a blood transfusion that is not covered by any insurance and is experimental.  Nothing seems to be working and it would seem at this time we are waiting for a the big stroke or heart attack to take him.  He is a former business owner who took a professional loss and now is on workman's comp from his job.  He is treated like a second class citizen since he isn't currently covered by private insurance.  He is the most amazing man, and everyone is overlooking him, and no one if following up.  Does anyone have any advice or things they have tried?  Anything would give us hope.