Ekena Millwork PML09X34ST Stockport Pre-Moulded Frames Panel Moulding, 8 5/8"W x 34"H, Primed

HI . do you have 48x30 , 6x30 and 24x30 ?

Are the corners cut already or do you have to cut them?

Does it already come in the rectangle shape as pictured? Do I need to cut and buy multiple pieces to make a square like some of the other photos?

Do they come in 4"x52" and 12"x24"?