[GeoffR]

Notes:

Be extra careful checking the version number of the firmware your device is running. There have been a lot of different 4.3 versions released, and the version number on the device must match exactly with the version number used for patching.


Other patches:

Here is a `Keyboard template` patch for the Aura One. (Paste into libnickel.so.1.0.0.patch. You'll need to fill in the replacement values with the keys you want according to the pattern in the comments.)

Spoiler:

<Patch>
patch_name = `Keyboard template (Aura One)`
patch_enable = `yes`
# patch_group = `Keyboard alternatives`
#
## Replaces keys on the Extended Latin keypad.
#
# Aura One keyboard layout:
#
# Row:  Position
# ---:-----------
# Top: 0123456789
# 2nd: 0123456789
# 3rd: 0123456789
# Bot:  12345678
#  
# Untested: Enable uppercase for `ß` key (Top row, pos 7)
#replace_bytes = 74D984, 00 26, 01 26
#
# Replace layout sign (Cyrillic example)
find_base_address = `ÉÀÇ`
replace_string = 0000, `ÉÀÇ`, `абв`
# Change keyboard layout
find_base_address = `š\0ž\0þ\0ŀ\0`
# Top row, pos 2-3
replace_string = 0000, `š`, `2`
replace_string = 0003, `ž`, `3`
# Top row, pos 6
replace_string = 0006, `þ`, `6`
# Top row, pos 9
replace_string = 0009, `ŀ`, `9`
#
find_base_address = `æ\0à\0è\0ì\0`
# Top row, pos 0-1
replace_string = 0021, `ý`, `0`
replace_string = 0045, `ÿ`, `1`
# Top row, pos 4-5
replace_string = 0000, `æ`, `4`
replace_string = 0024, `œ`, `5`
# Top row, pos 7-8
replace_string = 0054, `ß`, `7`
replace_string = 0060, `ij`, `8`
# Second row, left to right:
replace_string = 0003, `à`, `0`
replace_string = 0012, `á`, `1`
replace_string = 0027, `â`, `2`
replace_string = 0036, `ä`, `3`
replace_string = 0048, `ã`, `4`
replace_string = 0051, `å`, `5`
replace_string = 0006, `è`, `6`
replace_string = 0015, `é`, `7`
replace_string = 002A, `ê`, `8`
replace_string = 0039, `ë`, `9`
# Third row, left to right:
replace_string = 000C, `ò`, `0`
replace_string = 001B, `ó`, `1`
replace_string = 0030, `ô`, `2`
replace_string = 003F, `ö`, `3`
replace_string = 004E, `õ`, `4`
replace_string = 005D, `ø`, `5`
replace_string = 0009, `ì`, `6`
replace_string = 0018, `í`, `7`
replace_string = 002D, `î`, `8`
replace_string = 003C, `ï`, `9`
# Bottom row, left to right:
replace_string = 000F, `ù`, `1`
replace_string = 001E, `ú`, `2`
replace_string = 0033, `û`, `3`
replace_string = 0042, `ü`, `4`
replace_string = 004B, `ñ`, `5`
replace_string = 0057, `ç`, `6`
replace_string = 005A, `đ`, `7`
replace_string = 0063, `ł`, `8`
</Patch>

If anyone else has patches for firmware 4.3.8945 post them in this thread and I'll include a link here.