I expect the only place you may find NOS (new old stock) is on Yahoo! Auctions in Japan.

Is there a particular reason you want new parts? In my experience the barrel is more likely to wear than the RC Valve, so if you've mislaid them or they are indeed damaged, why not just put a wanted advert in Classifieds for a used set or a (complete) unrepairable barrel?
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Andy.
NSR-WORLD.COM

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