There is someone on ebay that sells top feed injector o-ring kits for ~ $24. Includes new injector filters too. Cheaper than going to Subaru. I've used these several times successfully. In a pinch (literally, when you pinch an o-ring and dump fuel all over your motor :meh: ) this doesn't work unless you want to wait for shipping.
Turns out the 97 Toyota Camry 4 cylinder (and some 281 other Toyota models, I just used the Camry as my example) gives you the same thing. It includes a small o-ring for the top, the upper rubber isolator, and the lower rubber seal. There is also a large o-ring that we don't need.
O'Reilly sells it under p/n BWD 274531.
CHECK THE BOX! One O'reilly only had boxes with 2 large o-rings. The other o'reilly had the correct assortment. Cost is $4. If you don't need/want the fuel injector filters it's cheaper than the ebay kit and available now.
http://www.oreillyauto.com/site/c/de...2524&ppt=C0024