Excellent advice - many thanks!Hope this helps.
If we are talking about front and rear Giubos: Pirelli made the originals. Malo (Akron) makes the new ones when they feel like it. The quality is high on these units as they appear to be made on the same tooling or at least same type as original without modification. There are no other suppliers for the front and rear flex discs that I have ever encountered.
The "thin" center Giubos were previously made by Jurid, and long gone. The current offerings I have encountered from some of the other vendors in Europe are unmarked and have the unmistakable "made in Asia somewhere" packaging and finish (side note - same goes for most of the center supports!) and I highly doubt they will reveal true country of origin because if it is packaged in Germany, it is claimed made in Germany...even if the part is made elsewhere.
Centerline used to offer a German-made center Giubo, I think from a BMW, that was machined down to the correct dimension until that source was no longer able to cost effectively provide them. Then, they switched to a different, German-manufactured center flex disc (which are definitely the best I've seen). Maybe it was Bilstein or something. I've used both of the versions provided by Centerline since Jurid has gone, and both were outstanding quality. The newest one I've seen is more expensive than others I've seen but it's quite clearly a higher quality part. Maybe I can post some photos.
So my input would be: front and rear Giubo, you can buy anywhere and it's the same part. Center Giubo, I would buy from Centerline.