82 gpz550 rear wheel

Hi guys
Gota quick question for anyone out there.Got a 82gpz550.It has a drum brake rear end.Ive had two sets ofbrake shoes sent from the states to fit this model.Both were wrong.The book says 180mm shoes fit?Way to big!Then gotsent 140mm shoes .Too smal!Does anyone know what brake shoes fit this model.Could the bike even be an american kz?Im at a loss to know what shoes to even chase up?
cheers Anthony

. Have you got a photo?

I've only ever seen the 550 with a disc brake rear, not drum. Is it a spoked wheel or "mag"? Those pics would come in handy.

same what he said.

shure its not just a z model?they had drum bracks on the rear

.....shure its not just a z model?they had drum bracks on the rear.....

yep, sounds like a Z550 to me....