Hello and welcome to FT joecobb22
Just tried for you. Impossible from my BAEC account and cannot book a cash fare either since BA’s IT will not recognise it.Now I don't know much about RAM, it is possible that they might not release reward flights on that route, who knows. So looks like you will need to call.
PS Don’t forget you only get 5 posts on your first day.
PPS Just tried Swanhunter’s suggestion, but cannot get that to work either.