I have been to local coin dealers. NO LUCK. I am looking to buy some soft coin silver dollars for a three fly effect. Does anyone know any online magic dealers that sell this?

Try ebay.

What you are looking for is commonly called "junk silver." You may be able to find them at Pawn shops or dealers who trade in precious metals. I'm surprised that local coin shops don't have some. Have you tried asking the coin shop owners to order some for you from other dealers?

Also, never heard back from you after you asked about the turnover switch. How did it/does it work for you?
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What you should be looking for is either Morgan or peace silver dollars, if you want larger dollar size coins, but, if you want smaller coins try walking libertys or Ben Franklin half dollars.

all 4 coins are made of 90% silver so they don't make as much noise.
Ebay is a great place to buy them but it's kinda hard to get a bunch of them with the same dates