If that 'white plastic component' is the thing the keys clip into, then you are goign to have problems replacig it on its own. The part originally had long pegs moutined on it. THese go through the leaf springs (one under each key), the rubber sheet, 3 layers of mylar and the metal backing plate. THey are then melted over ('heat staked') to hold the whole lot together. Needless to say you can't really remove one and then reattach it. There's not enough pag left to cut off the heat stakes and then re-form them. And it needs to be a solid fixing, it holds the leaf springs after all. I have (once) taken apart a deat LK201 keyboard mechanism to see how it was built. I've not managed to reassemble one reliably. What you wnt ot find is an LK201 with a damageed casing or dead encoder board. YOu cna then use the ocmplete mechanism. The keycaps can be removed (you ned to twist them slithgly to release the lcokign barbs), getting one with the wrong layouyt, or the word processor version, or... is not a problem/ -tony