And here's some of what the seller emailed to me:

"Please send them back to me cod Australia post, so I can inspect them as I know on other Melbourne sellers are wider and are in correct"
"These are a -1 latest revision"
"I asked for the part number from your manual, maybe demoman uses something different, and you ordered the wrong part".

My thoughts:
Don't care what other sellers are doing I bought them from you.
Maybe the revision is the problem.
Part number is spot on. The manual lists 01-11400, the seller sells 01-11400-1 (the revised version for Williams/Bally), no I did not order the wrong part.
Most of all - trust me - I'm your customer, they are wider, & instead of you needing to inspect them why not just send me the correct brackets asap so I can finish my project.

Anyway sending them back today cod & will see how it goes.