Any of these cups may allow you to narrow the front end slightly.
https://profile-design.com/...s/ergo-armrest-kit-1
https://profile-design.com/...s/race-armrest-kit-1
https://profile-design.com/...cts/ergo-armrest-kit
You should also be able to reverse the brackets (move the left to the right, and the right to the left) with the cup mounting pads still outboard and gain a little bit of additional reach.
https://profile-design.com/...s/ergo-armrest-kit-1
https://profile-design.com/...s/race-armrest-kit-1
https://profile-design.com/...cts/ergo-armrest-kit
You should also be able to reverse the brackets (move the left to the right, and the right to the left) with the cup mounting pads still outboard and gain a little bit of additional reach.