The seats are called LS-C (LS being the large upper bolster, C being the lower bolster/thigh style).
Only the centers use black monza fabric on the Verde (as do some other vehicles). The bolsters and headrests and backing are made of black avus cloth. There are also several other monza color versions (blue, tan, olive, etc.).
I bought some from Italy a few weeks back but found it darker than normal, which now I cannot use on my car cheers Jason
The original fabric is in fact a lot darker than what is on most cars - UV does fade this material like any other. It can be shocking compared to used seats. I have a set of NOS covers (the full covers with the Black Avus outer material and the 2-tone Black Monza inner material) and they are a fairly dark grey. The attached image was scanned from '88 Verde factory brochure and I think the color is fairly accurate. Still, there can be some variation from dye lot to dye lot and you might have gotten some particularly dark material.
For all those that have inquired we are STILL fighting to have this material manufactured. There have been a lot of false starts, lies, time wasters, and a lot of $$$ spent so far without a result but we are keeping after it in hopes that soon we will have a quality reproduction.