I thought they just mailed them to me for that!
Seriously, you put the spacer back in with the spring and lock bar where they belong. Then tighten it all together without the blade in place.
This way you do not squish the little nipples on the spring holder and permanently damage them.
Now its the hard part. What I recommend is a dental explorer which you can buy on the internet. Doesn't even have to be a real good quality one, just something that small helps. I've done it with a very small screwdriver like you use for your glasses also.
Once it is all together except for the blade put the blade in so the lockbar grabs it as it should and get it pretty close to where it needs to be so you can see through the pivot hole. You will have to depress the lockbar steadily for this. Once its in place slide one washer in place. This one will be fairly easy. Using your small tool help coax it in until you can see the start of the hole in the center of the washer then using a 1/8" diameter tool like your typical torx driver for the T6 screws you line it up good as it needs to be sliding the tool shaft in and around to slide the pivot through.
Slide the pivot through but not all the way. You need to leave room for the other washer on the opposite side. Now things are tighter in the pivot so this next one is harder but it can be done, so just flip the knife, while still keeping the lock bar from getting away from you.
You should be looking down into the pivot barrel now and at this point you want to finesse the next and final washer in like the last one only this time you may need to use the small explorer or screwdriver to help center it. Once close you slide the pivot through. If it catches the edges of the washer don't force it, finesse it. Use the driver tool to spin it around if you need to. Once its lined up slide the pivot all the way in till it seats and tighten it down.
Are you regretting taking that thing apart yet?

Thought so. Its a royal PITA but it must be done this way or it will most always damage that spacer in the rear that is under spring tension.
STR