I bought one last year, and just bought another a month ago, not as rare as you think, one on ebay now, and always on craigslist somewhere in the US. PLENTY of usefull and helpfull people on this site and isuzupup.com and planetisuzu.com
plus tons of parts in AU and NZ and shipping not to bad at that, once dialed, they are a true trooper. def. replace the timing belt though, i went through that one about 6 months ago, did a little damage but not half as bad as i was thinking, i too was looking to give up and give away until i got alot of help on these sites. my first one runs on bio/veg and looking to convert this new one soon too. congrats and a great find.