Well to be honest with you, I'd just give you a DVD-R containing roms of all the first six FF games, because I wouldn't wanna condone anyone giving Square Enix money, let alone money for worse versions of FF games than previous rereleases (except 3). But, it's your money, and your shelf space. Wasn't that cartridge something like $80 to begin with?
https://www.play-asia.com/final-fantasy-i-vi-pixel-remaster-collection-multi-language/13/70g0qp There you go. If you wanted an American-region one, you're probably up a creek, but that one says it's in stock and supports English.
Btw, FF1 and 2 are $12 each, and 3/4/5/6 are $18 each. So it is a little cheaper to buy the cartridge. Or, you know, roms are free.