Surfacing this for those of you who might be interested but weren't following a different thread -
You can buy BlackBerry Q10 keyboard assemblies for US$3.50 or less each (+ shipping from HK): https://www.etradesupply.com/blackberry-q10-keypad-and-keyboard-assembly.html
Repo of all the details necessary to integrate said keyboard assembly into your own projects: https://github.com/arturo182/BBQ10KBD
I guess the lack of silk screen for \ | etc probably tells me enough about a lack of convention for that
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