If you are going for an odd number link count, you need a half link. They can be hard to find for some chains. Diamond non-Oring chains should have them available, though.
I don't know who makes the OEM chain for Enfield, but those are junk. The inner bushings will break up and let everything just kinda hang loose! The thing to look for is how far the chain will curve across the pins. If you lay it on the ground and see how much you can get of it. Should be very little. A shot one looks like the picture below. they should only have maybe a 6" curve if they are good. On the bike, pull up on a link on the sprocket. If it comes up more than a half tooth, it is shot!
Bare