There is another (cheap) option. I had this same situation on a rupp HS40 motor. Took it to the machine shop and they said, "you know we can take just a tiny bit off the connecting rod mating surfaces, and it will run tight around that worn journal." So that's what they did.
First they smoothed the crankshaft journal. Mine had obvious wear. That took about 2 minutes of work. Then they did some light machining/metal removal to the connecting rod halves so when tightened, then were tighter around the crankshaft journal. That took another 2 minutes.
Cost was FREE (i think the guy felt sorry for me.) The motor actually is still running fine. I don't know what the life will be, but for as little as i use it, the engine seems to work fine.
I was pretty skeptical about the whole thing. But damn the motor was pretty worn out, i really didn't have much to loose. (It had other wear problems too.)
I know this isn't accepted practice, but it did seem to work. You can always go back in the future and have it done correctly, and install a new Arc connecting rod. Obviously don't do this modification to a brand new Arc connecting rod!