it would help if you posted year and model of Roo.
but the Roo line since at least 2006, has used Marinco power products.
if it's older than that, i'm not sure what company they used.
Marinco is very helpful and they're headquartered where i live. they replaced a power cord free of charge for my '07 Roo 23SS.
depending on how old it is, you might take a pic of the cracked outlet and send the pic to them. they might send you a free replacement.
and Zoe the Wonder Dog(R.I.P.)
'07 Roo 23SS pushing an '07 Chevy Avalanche
Equalizer WDH and Prodigy BC