I was going to post a new thread about this but your question is a good place to start too. I just received a new rim via ebay purchase from meyer motorcycles in percy, Il. It's for a 75 750. It was billed a NOS. As it turns out, it's certainly not old stock, but it is a new rim made in Indonesia by D.I.D, a Japanese company that has a good reputation for their motorcycle chains. Looks like D.I.D also makes all sorts of rims and spokes. So, there's a source for you. Just google DID rims and you'll get their web site, but that isn't so helpful. You can it on ebay and get a wide selection of whole wheels or rims or spokes.
The rim I have bought looks well made and the chrome looks pretty good. It was wrapped in DID paper and had an official looking Honda OEM sticker on it, but the sticker also indicated it was made in Indonesia. The only problem I have with any of this is it isn't really NOS as I understand it and did I pay a premium for NOS when in fact it isn't. The rim price was $99.95 plus shipping.
Anyone's thoughts here.