These are the ones I've just put on my F model YZ, they're a Cemoto brand I think from Pro Accessories in Woolloongabba, Brisbane. They're definately not the really tightly packed style of gator, and are quite a chunky rubber, so I think they may be close to what you're after.
Sorry about the quality of the pic it's via the mobile phone camera. Let me know if you want a better one and I'll email you a proper pic.
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