It's quite likely the device will be suitable, but very unlikely that
the manufacturer will undertake to rate it there (needing a whole
new round of capability and qualification work, for a trivial market
compared to the industrial temp range).
Now, industry segments such as down-hole live by characterizing
parts for environments that were unintended and unsupported.
Taking MIL or industrial temp range piece-parts out to 200-300C.
They hold that knowledge as stock-in-trade. You could do the
same.
But if you want a certificate and a bow on it, from somebody
else doing the work, good luck.
I'd begin with the "existence proof" and work forward to sample
size and reliability (although accelerating a part you want to
use at 125C, when it's in standard plastic packaging, may be
a bit stanky....).
Things to beware are latchup (exacerbated at high temp), and
the usual wearout mechanisms (TDDB, EM). If you can stand a
less-than-rated service life (like downhole instruments generally)
then these may not kill you. But you might undertake to perrform
some pin electrical latchup testing at temp (plus margin) to set
any special design reliability guidelines.