I'm still waiting for my GRilli3D sheets to be delivered

Three weeks ago, I received an eMail with an UPSP tracking number documenting that my order has been shipped. GRilli3D had some problems with getting the sheets from the manufacturer as well. But it seems like the tracking system is rather useless for this type of delivery. According to the website/database, the parcel didn't get picked up yet from senders office.
So, there won't be any reviews or further videos until it arrived.