Which spoiler are you referring to? By saying you've "noticed a lot of capris" with the bigger wings, I can only assume you are referring to the stock 94 XR2 style :
This is the 91-93 XR2 style:
And this would be the "F-40 style":
There are only a couple other choices, including ultra rare Rod Millin wings (I have one, but sorry, no pic!).
So, which wing are you referring to?