Hello Simone,
There are some BIN files available for the 15M at
https://www.v11lemans.com/forums/index.php?/topic/21701-ecu-bin-maps/
If you cannot download them, send me a personal message, and I will email them to you.
I can't find a 15RC BIN, but there are people who may help. See discussions:
https://www.v11lemans.com/forums/index.php?/topic/16359-california-vintage/page/6/&tab=comments#elControls_251108_menu
https://www.v11lemans.com/forums/index.php?/topic/22035-ecu-limited-by-stock-o2/
DD fitted a 15M in place of a 15RC and with Meinolf's BIN, he is very happy with the results. This disabled the lambda sensor.
https://www.v11lemans.com/forums/index.php?/topic/19652-v11-ecu-15rc-vs-15m/
Happy 2021, Marty.