I use all sorts of cables in my machine, and have never seen these.
The only place maybe some of the specialist computer stores, but I think ordering will be the safest and fastest way.
Tomorrow at 8am ish, I will drop my Thai visitors at Pearson Airport, and start the drive home with my sanity just about intact.
A Merry Christmas and a Happy New Year to All - Sorry, political correctness just left the building!!