'02 to '05 grill conversion: need help referencing a part#

[CharltonWard]

good afternoon, i am attempting to facelift my 02 to the 03-05 grill and need help with part numbers. I already have the sub panels (pictured: #9 / 53931B & 53932B) but need the filler panel (pictured: #7 / 53903B.) My question is: is part# 53903-60070 (03-05, I think) the same/interchangeable with part# 52506-60061 (06-07, I think)? Everywhere I look the 03-05 part is 5-6x the price of the 06-07 part ($45ish vs $300ish) which leads me to believe i may have made an error somewhere.