I have whole diy fpv goggle kit...
1. 4.3 inch monitor (non Blue screen )
2. Fresnel lens sheet (for magnification)
3. Rca connector for video input
I CAN provide you with 5mm foam sheet to build the box if you don't have foam or depron sheet.
If you go by this video you will get an aprox 100 inch display at 2 meter distance
I CAN give you more video links if you like or search them yourself
Asking price is 2000 excluding shipping
Can't beat this price for fpv goggle