I bought brand new rollers last summer for my 310 Case. $130 each plus shipping. I bought a whole pallet load and shipping was $200. From the following place. He had them direct ship from a warehouse in New Jersey and I had them sent to Michigan.
The brand new rollers fit Case 310s and 350s. DCF brand part #4070003
13874 Hwy 5 Versailles, MO 65084 (573) 378-7210