I edited my reply while you quoted me... found them on Priority but just 275 and 295 for 15"s as you mention, but I have seen 255s on ebay

https://www.prioritytire.com/firestone-firehawk-indy-500-295-50r15-105s-sl-as-a-s-all-season-tire/


Last time I saw indys being sold it was maybe 10 years ago... couple of years after I got mines... on those days it was hard to me to get mines in fact. I think on those days were discontinued already. But... maybe a new batch?


Editing: Nevermind... 255 I saw were on a mexican website ( also Colombia )

https://radialllantas.com/products/255-60-r15-firestone-firehawk-indy-500-102s

also 70 profile available around