The chain is considered the weak link in the 203 as it stretches out, but gets eliminated in the doubling unit with the 205. I've seen a couple of divorced 203s online, but never get to put a bid in on time. Hard to find for sure.
If it is divorced, I would save it and collect change for the doubler. I wouldn't put in the 203 all by itself unless the 200 is toast and you had no other options. Even though it is strong I agree with jeeper about the weaknesses.
Come and take it
Go work at joann fabrics if you can't shoot a gun