I think HarryBurgandy has done this.
Take anything Caswell say with a massive pinch of salt. Product descriptions may be very inaccurate (anodising chemicals). This is on the old website, they now have a new European distributor but currently the only website is the old one.
Hopefully the new distributor will sort things out. The old ones were rude, unhelpful and stuck in the dark ages.
Gateros Plating are good, I've had some parts arrive from them this morning.