Which flywheel (SIP assortiment) fits with contact breakers?

for Vespa GL VGLA1M -59 6Volt ignition with points

Try with article 15077700, you also need fanwheel for it.

Driving it on my 1972 SV for about 2 years now without problems.

Or maybe try converson to 12V with flytech or vespatronic ignition...