A huge amount of rads and matrix etc coming from Poland in particular now, but everyone I've seen quality was excellent, and I use the polish matrix myself, fitted 2 rads this year both polish, not a problem at all, the way they wrap them for transit tells you they take care, takes bloody ages to remove it all.
If you can though in future get a brass matrix from TC HARRISON, as you will get around 200% more heat, and it will last longer, but 3-4 times the price.
tabetha