I don't think usagi hates the car, just the company behind the car. It sucks that you can't get parts, that's really a shame as this is a great car. Have you tried talking to the hobby shops or their distributors as to why this is so? I can't imagine why Hudy/Xray wouldn't want to deal with stores in Japan, or anywhere for that matter. It doesn't make any sense at all (Isn't one guy's money as good as the next?) So, I really doubt Hudy/Xray is selling to your distributors at a higher cost, or is less willing to deal with them.
If you've already tried getting answers from the distributors/hobby shops, or they won't give any answers, I hate to say it, but you'd might as well change cars and forget about this one. There's no sense in running something you can't afford parts for.