Longer 5/16 body bolts?

Looking for 1 3/4 or 2" bolts.
Don´t thing these come any longer than 1 1/4" but are their any longer, with the same type head? Captured washer can be faked and marking not that important either.
Dog point can be fixed too.
So longer bolts with this particular head is what I´m looking for.
Is for my front seats to floor fastening.
View attachment 1715236591

Sorry about me ranting about these bolts, but 1 1/4" is effective threaded length. Right? I mean you never know about Ma Mopar...
See pic above.
Thanks för helping me.