Komatsu 4D105-3 Rebuild Kit

Any recommendations on where to get a rebuild kit for my Komatsu D31 dozer with a 4D105-3 engine. I know there's probably a lot of suppliers out there who know what they're doing and some that don't, so help me out here. I know there are quality name brand parts out there a lot less than the inflated prices at Komatsu. The shop manual shows 5 different sizes of rod bearings so I need someone with some expertise. Thanks

Komatsu 4D105-3 Rebuild Kit