i know they came on 76 to 81 sunbirds. they are the size of ralley 2 center caps , but are thicker and have a raised circle with the symble in the middle. i have 2 and will post some pics so you can see what i am looking for. i was told they are common on the canadian style four spoke ralleys.never heard of them.for the astre.ill give you a gallon of gas or litre or looney whatever is more i would offer dollars but i think the peso is worth more now unless you want pennies which are worth 1 and a half cents.