rear cargo speakers

[Hellz]

so im looking for some replacement speakers for the rear cargo area. the small speakers in the pillars.

has anyone replaced these with any aftermarket speakers?

i cant find any name brand replacements, nor does anyone really know what sizes they are. im guessing about 2.5 inch, but honestly havent measured them.

nothing is wrong with the current speakers, im just looking to upgrade to aftermarket ones, and just want to know what options are out there.

so any info would be appreciated.

thanks

2003 H2
Y91 Bose system w/6 CD changer that was repalced with a Pioneer AVH-P4000DVD unit. speakers and amp are stock