Like you I wanted some products from Sim-Lab, only to find that all the grey profile versions were showing as not available.
Got in touch with Darko who is probably one of the best guys at Sim-Lab. He said they had moved over to only black profile and ceased stocking grey profile for any products or custom cutting, although I was told they might have some old stock around.
As much as I highly rate Sim-Lab, to be honest I think this shows poor foresight and bad support for their previous customer base, who like me invested a lot in their products.
To disregard them without even giving an option to choose grey is just disappointing really.
The only option from Sim-Lab now if you want grey profile is go somewhere else.
That somewhere else for me is Motedis who do everything you need on profile and parts.