I need some guidance here guys , i need to get the correct panels for a repair on a 72 coupe and with all the superseded numbers in the pet catalog i'm lost as to what is correct and not .
Number 1 - front scuttle panel

This does not appear on the stoddard / auto atlanta site for coupe but does for targa, but the targa number has changed to another item SS 91150308742GRV but i'm not sure if this will fit a coupe . My supplier has advised the new number 911 503 087 42GRV which is a supersession for 901 503 057 or do i need the whole part g90150309021 which is listed on stoddards?

panel no 2 is the rear cross member which used to be g91150183000 and
g90150108720 now i'm told it's Rear cross member 911 507 080 01GRV & 911 507 095 00GRV but the pet diagram looks like the outer part is the later addition for the rear reflector and not needed for the pre 73 cars ?

HELP!!!! very confused