The M10 bolt thread was me a long time ago...... there are a couple of types of lift up handle doors, 99.9 percent use the antiburst or earlier which are pennies, howeevr if you have fitted lift up with the morris marina type pull flap forward handle inside then you need a very very rare type of pin, in 3 years i only ever sourced one shop with old stock and they wanted £50+ per pin!!! the doors are mega rare and fitted to the very first 110's for a few months (split rears top / bottom), no idea if the bolts would also fit normal locks abut prob would