There are robust 3-part oars made by Carlisle, meant for river rafting.
For the World: 9.5 foot model with counterweights is good for rowing. You might need to have custom rowlocks made in order to avoid the oars rubbing on the gunwale.
Bare in mind that a pair of these is heavy.
If budget allows, a better combination for stink-free cruising aid might be a small electric outboard and a pair of short/light paddles…