I got a replica off of eBay for £93 delivered, I can dig out the link if you'd like. The difference is that my new one doesn't say renaultsport on the underside, and the finishing isn't perfect.
I was looking at them just the other day. I like the fact that they'll send them to your colour specification and can airbrush on logos.
I did see on a Facebook group just the other day though that someone managed to source a genuine one which looks blooming awesome. The end plates are mounded and not screwed on. I'll see if I can unearth a picture. I've tried to find one but to no avail.
*Edit* Here we go...they're low res images off Facebook but you get the idea.