Can you do that mod to these to connect them into 1 bigger SnS-style basket? If so, does anyone know where I could get a pair of them? I'm not sure I trust the 1 newly launched seller on Amazon that has them for $54.
You're talking about the Bro' N Sear project where the guy breaks open the left end of one Weber basket and the right end of the other, nests them together at 19" wide, and screws them together to make a DIY Slow N Sear? I don't see why you couldn't do it, it will just be more work because this stainless material is thicker.
As for buying them, the Amazon link is the only source I know of. I'm not really sure what the status is anymore. As noted in the original post, they were produced by TVWB member David Somerville, made to his specs in China, and sold on Amazon. He also made s/s cooking grates for a while. I know he had real challenges with overseas production and with Amazon as a sales channel. I'm with you re: trust of the current seller at $54...maybe not David anymore?