Parts for a Mitsubishi BD 2 F Dozer

Hello Everyone! Just signed up and am an admitted Heavy Equipmentholic, and looking to purchase an old (1986) Mitsubishi BD 2 F dozer. It is in surprisingly good shape, no rust, good paint, 6 way blade. Has the S4E 39 HP engine (1B50096). My BIG question is, are there any used equipment dealers that carry parts for this old girl? I heard they are real tough if not impossible to find. The Dozer does need a new clutch and the engine is weak, so probably needs a rebuild. A lot of the dozer parts can be made by a big Machine shop but the engine is another story as far as new pistons, rings gaskets etc. It is priced at almost scrap metal price and the hydraulic 6 way blade is probably worth at least $2K, it is straight. Undercarriage is at least 70% so hate to see it get parted out but want to make sure parts are avaialable before I buy it. Any ideas or can anyone point me to a parts distributor to do some checking up on ? Thanks