Looks like you've got a nice condition 94 there buddy great find. We use to run large scale car body's BITD here I ran my 870C with a wide arched MK4 escort body, it was the first incarnation of the TC lol.
Screws can be other orded in the size and quantity needed or if you search YZ10 on eBay you'll see a place in Germany I think it is offering complete screw kits for them.
Body and under tray can also be found on eBay from either Penguin or TBG and you'll be wanting the one with the small scoop on the left hand side of the car
