I didn't know there was a Barlow 23...18, 20, 24 and 26s, yes.
They are fairly straightforward to service. I do it every couple of years. Lewmar pawl springs will work in a pinch if you can't get them from Arco, because in my experience, these are the tiny pieces most likely to go flying in the drink when you dissemble the winches.
In fact, I now get an old plastic food bucket of the type that restaurants use to deliver 25 litres of oil, etc., cut a winch base-sized hole in it, and take the winch apart inside that. Saves some grief if pieces come apart.