Feature request for modification of ts 100

Hello, i have a ts 100 , in which i have installed ralim firmware before. later some day, its oled got dim and now it is totally dead. i searched for .69 inch oled in many places.. only chinese sellers have them. and i cant buy from them since shipping from china is blocked in my country ( india ) .. those available in my country are so much expensive ( 13 usd if converted ) .. while bigger display with higher resolution are available at much cheaper price ( 1.2-1.3 usd ) in my country. Those displays use the same ssd 1306 control ic . i want to mod my iron with a .91 or .96 inch display ( 12832 ) . can you please point out what modifications ( on source files ) i should do in order to use a bigger display with higher resolution ( i can do the hardware modifications myself ) so that the images and fonts will be displayed properly in a 12832 size display.