Did you try pinball shops?
Yes, of course I did. No luck....except a shop in USA with prices far beyond this planet

The guy who offered the stuff is local413 from the KLOV-Forum.
Here's his first mail:
Red and white, long shaft leaf buttons?
I may have a decent stock of nos ones.. Also have the holders, nuts, and leaves all nos.. Plus I have one nos berzerk bat handle (just handle no threaded shaft) and some small parts for that assembly.
Yes I ship worldwide.
Buttons are $4.75 each
Holders are $3.50 each
Leaves are $2.00 each
Nuts are free
Bat handle is $35
Other bits of the assembly are free
Shipping is $15.50-18.00
Yes I take Paypal.
Let me know if there is anything else your looking for, as I've got a 3 car garage full of parts 
Pete
And his second one, after I asked for more details about what he stocks in his garage:
I've got quite a few long leaf buttons, so let me know if anyone else needs certain colors. Short ones seem harder to find these days.
Berzerk stick parts, might have a spring or two.. Possible a clip..
It's difficult to inventory my parts.. As I'm constantly buying out local ops and dumping the stuff in my garage.. Here a list of what I specialize in:
Rebuilding of Atari ARIIs
Rebuilt and working Zookeeper and Qix pcbs (mainly CPU pcbs with battery mod)
Rebuilding of k7000 series monitors
Rebuilt monitors with new burn free tubes
Sourcing and building wico (and others) joysticks with almost all nos parts. Have lots of shafts (no 4" though)
Nintendo sticks and buttons
Sega sticks and buttons
Cabinet hardware
Taito parts
Williams parts
Pinball parts
Also have a stock of taito and Williams ATX ps adapters and power supplies with -5
If someone is interested in something from his list, feel free to ask him over at KLOV or let me know and I will ask for you (if you're not a member there).
I'm afraid I will have to order the whites buttons from him and would be glad to offer combined shipping with others
