Nice little unit! I bought one just like it in August. I see you got the swinging drawbar with that one. I had to build one for mine.
On the 57,the wheels are red,the grille is yellow.
What parts do you need? Korveroliver.com is a good source for a lot of parts for those. Kent Gordon in Palestine Texas parts those out,has most everything. I needed a few parts for mine that Korves and Kent didn't have,Larry Svehlak in Taylor Texas had the rest of what I needed. They're both on here from time to time or most folks here can give you their contact information.
Enjoy! They're a heck of a nice tractor.