@M0YNG Yep, can download modded firmware here: http://members.optuszoo.com.au/jason.reilly1/868mods.htm#ExpandRX
Also expanded RX frequencies too, although I myself don't use anything beyond the standard 136-174 and 400-488 bands. Installed just like stock 1.24N firmware.
@M0YNG correction 400-480 not 488.