I am after one of the lots listed here on ebay:
https://www.ebay.co.uk/itm/WING-NUTS-BSF-3-8-PACK-25/124347245745?hash=item1cf3ac64b1:g 
jMAAOSw8d1faSWZ
The seller doesn't list postage to Canada, and when I try to contact him ebay says he has too many messages and halts the request. If I try to buy it now, it also blocks me as "seller doesn't post to Canada".
If someone would buy me a pack of 25, I would reimburse all costs including postage to Canada.
Thanks in advance.