I don't think your're going to find the "magic bullet" in alternative therapies but best of luck. Taking sinemet gives the best relief in advanced patients but you have to worry about dyskinesias and carefully watch when and what you eat because of protein interference. One regime that works for me and others is to take a 25/100 tablet plus 50/200CR first thing in the morning on an empty stomach to get a kickstart and then a 25/100 every 3 hrs with maybe an additional (1/2) 25/100 or a 50/200CR. It certainly isn't an easy drug regime to follow. I am probably undermedicated later in the day but that's my choice.
I know a number of advanced pd'ers that have done fine for years on a combination of sinemet, comtan, requip and amantadine, met them at a spinning class that they attend 3 times a week.