I have been searching for suppliers of these products as we have got quite a few requests for it but have not been able to find more aside from those that we have in our directory.
Dakine.com accepts orders from international customers but they are manufacturers of bags and accessories only. You can give them a try. You can also enquire if they can dropship for you.
If you do a forum search, you will find some related posts that will confirm what you already know- that indeed it is quite difficult to source these products. You will also find that most of these suppliers, if not all, only deal with resellers with established businesses and if possible, with a storefront selling Skateboards/Snowboards and Accessories. This will also be the same issue that you will encounter if you go straight to the manufacturers. You can try to contact the manufacturers directly and check out their distributors or enquire how you can be one. You can also check out liquidators like caliquidators.com, liquidation.com for some skate/snowboard merchandize.
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I wish you all the best!