Are they location specific i.e. just Sarnia border crossing or are they nation wide as in I could use them in Niagara Falls?
I do not know. I am sure there are other places doing the same thing near you though. A quick search for things in Niagara falls N.Y. area. http://247parcel.com/ https://www.nyaddress.ca/ https://www.islandshipcenter.com/canadian-visitor-services/ https://www.crossborderpickups.ca/