Cheeky mock up using an S9 rear door looks promising.
Daves now got the painstaking task of making the rear doors flares & returns from scratch, good job he's not bad at the metal lark.
Can't use the doors he already made as the S9 onwards used wagon rear doors with a higher latched strike pin. This allowed for larger wheel clearance when the rear wheels were bought even further forward on the S9 onwards. As it is the S7/8 brings them further 15mm to standard.