"Those who shout loudest are most often heard" springs to mind.... It wouldn't hurt to try. After all if we try and nothing comes of it we will still be in the same position as now, so there's nothing to loose.
I think the problem is that Xpart only make the spares in batches when there are x number on order. As i'm sure you can guess there are some parts needed more than others, and it's the less needed parts seem to be the problem. As far as i am aware most parts are easily enough got.
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