a Kitchen supply shop will have more than 2 models, some will have plastic but they will be over molded full-tang metal under them, then you can just get scissors designed for something other than kitchen use, lots are out there
That said, plenty of all metal ones exist
Funnily enough, choice was so limited specifically because I didn't want any plastic and I refused to consider the ones on Amazon on general principle, which ruled out the Newness ones and I didn't like the Grunwerg ones because I suspect those over-handles are sintered crap that's barely better than plastic.
So now it's a choice between the ones on Sinplastico, a Chinese brand and a handful of artisan "best of British" brands that were very expensive (and also generally have ostentatiously old-fashioned styling).
There are about 2 models of all-metal scissors.