Question..
Did a 70 442 convertible W30 come with a rear spoiler ?

 

No convertible ever came from the Oldsmobile factory with a wing, period. The 1970-72 wing uprights aren't angled to properly fit the convertible trunklid. And since someone will mention the 1969 H/O convertible, Olds didn't put that wing on, Demmer did.

 

Is there a spoiler that will fit a 69 convertible, or at least close?

 

There is only one wing, the one used on the 1969 H/O and the 1970-71 442s. Hurst used it on the 1969 H/O convertibles. In reality, the 68-69 convertible trunklids aren't angled very differently from those on the coupes. Since the 1970-72 convertibles are based on the Supreme, that trunk angle is somewhat different.