what size are the plastic push rivets

    Go to NAPA  Auto Parts. Balkamp #665-2389.  7 in a bag.

[2015 Z Force 800 53/Trail EPS]

They are actually 7.5mm but we all use the 8mm. These. There is a 100 per bag but you can get smaller quantities. And the hears are a little bigger so they don't break as easy.

https://www.amazon.com/GOOACC-Fastener-21030249-N807389S-Remover/dp/B07P413F41/ref=sr_1_5?dchild=1&keywords=8mm+push+pin&qid=1590444531&sr=8-5