Correct wheel cylinder screws

[R/T's 4 R/P]

I am looking for a complete set of wheel cylinder screws.
1/4"- 20.
Is Either the 3/8" head style or the 7/16" head style, correct? (I am not sure if one style was used at differ times of the year..or if is random.)

If anyone sells them new...let me know as I have not been able to find them. Good used is fine.
Maybe AMK, but they have a minimum purchase.

[Skdmark]

These?

https://www.partsmix.com/mopar-1970-1974-wheel-cylinder-bolt-kit/

[anlauto]

Not that it helps....But I just dismantled a rear end out of an AAR I'm restoring....it had two different styles, one on each side...yet the wheel cylinders both matched and looked original not saying it left the factory that way, a lot can happen in 52 years, but I found it odd...

[R/T's 4 R/P]

Thanks.
Not sure how i missed the Partsmix option in my searches...

It would seem to me that the 3/8 head version would be the factory option as it seems like something goofy Chrysler would have done. Anyone else, including the aftermarket would just use a standard fastener. But I could also see this as one of those places where they used screws from different suppliers.
I also have found some with the 5/16 screw size (1/2" head)...which I think were later aftermarket.