I bought my Mitsubishi L3E through Craig's List from a guy up in Washington State. Paid $500 for the engine, fan, radiator, starter, alternator, etc. Another $225 got it shipped by a one-horse freight company out of Twin Falls.
They used the Z482 in a lot of reefer units. They have a 6 qt oil pan (quite large) but a smaller one can be added. They're nominally 10 hp, but I've seen some rated close to 14 hp. There's also a guy down in Beaver, UT that sells rebuilt engines though they're pricey.
BTW, for some odd reason, Kubota uses the first letter of the German words for one (Eins), two (Zwei), three (Drei), four (Vier) and six (Sechs) and eight (Acht) to denote the number of cylinders in their engine model numbers. A Z482 is a two cylinder, a D1005 is a three cylinder, etc. The numbers give the approximate displacement in cc's.
I think all the Yanmar 3TNs are similar block size. The 330 uses a 3TN66UJ, the 430 uses a 3TNA77UJ. Keep your eyes peeled for one of these. There's also a seller on eBay out of Tennessee that has a lot of different small diesels available. They typically go for $800+ but his freight is real reasonable.
BTW, if you run across 2 Z482s or similar twin engine diesels, I'm thinking serioiusly of repowering my Case 444 with one.