Flyin Miata hard line oil return kit
 

Attachment 233365
As pictured. This has never actually had oil in it, although I did try to install it, and found that it won't work with my setup which is a bit different from the usual FM stuff. It has some dirt on it now, but everything that comes with the kit is included, so all you need to do is install it. Retail is $89.99+ship, selling for $65 shipped.