Oh that is all kinds of awesome! This has seriously made my afternoon.
Cary Grant wears a Haspel drip dry suit in Charade. Here's an article about it and here's the scene from the movie where he demonstrates it while taking a shower.
The full movie is on Youtube here.
It takes place in Paris and the plot is about how a gang of criminals, along with the US Treasury Department, is after the $250,000 that Audrey Hepburn's deceased husband stole during the War.
In the movie Cary Grant also wears a brown tweed sport coat, which looks like it has some black in it here. If that's what Tina meant by dark brown with possibly a thin black stripe, then it's (probably) a common material. However, the Haspel drip dry jacket from the eBay listing is the only example of (or part of) a suit made from dark brown material with thin black pinstripes that I've come across in well over 100 hours of searching (Vintage/antique clothing and design is a passion).