Dresser 520B center pin

I need to find the exact dimension of the lower center pin on a 1988 520B. My old pin was chewed and is garbage. Front half of the machine was line bored and the new bearing is in. Realized I need to line bore the back half of the machine but need a measurment. Dealer said the pin was discontinued. Tried a few places but no luck. Looking for a measurment now to have one made any help is much appreciated