Here are some that will at least slow down the Yorkie Terrors!
There are some toys made out of recycled fire hoses. One is
Four Paws Products Toy Crunch & Crackle Black Large - 23000 and there are others called Sqwuggies Squeak ‘n Tug Toy --
Amazon.com: Sqwuggies Squeak 'n Tug Dog Toys -...
Mega ring -- 7 layer soft toy
Tuffy Pet Toy - Tough Dog Toy, Durable, Dog Toy, Indestructible Dog Toy, Soft Squeaky Dog Toy, Combat Tough, Tuffies,Mighty, Silly Squeakers
Booda Quirkies bones and balls and the Dogzilla toys -- mine did not liek the rubber taste I guess, as they did not play with them much.
Top Paws Goofy ball is a good one too -- it makes a gurgly sound and bounces randomly. I haven't tried this one but it looks like mine might like it because it makes a funny sound.