Bed carburetor rebuild kit for df750 engine

I'm looking for a carburetor rebuild kit for a Kubota df750. It uses a nikki carb. Part number is EG261-44012. This is a Kubota number and I can't figure out the nikki number. I'm really only looking for the non metal pieces, so I can pull it apart and do a deep clean. I noticed one o ring is already a little stretched.