I'm just curious if anyone's had any success or knowlege of others, who may have arranged a bulk purchase of OSB sheathing, direct from any of the certified canadian manufacturers?

What amount are you thinking is "bulk"?

A load like one would commonly see on a flatbed railcar?

If you are in an area outside of their regular distribution system, you might try contacting them with your banking/credit info in hand. If you are inside their regular distribution system, you'd have to think about what incentive they have to circumvent that for a single purchase that probably isn't much more than $USD50,000. You might be better off using it to bolster your account at a local distributor.

Thanks ICF for your valuable input. I appreciate your time and comments.