UPDATE

Ok so I managed to make a seal myself, it works rather well. I went to ace and bought a neoprene washer and cut it to the right size. But one thing went very wrong.

After I changed my oil, I put the extra oil (1 quart) in my trunk. I tightend the cap well, beacuse I was afraid of it spilling. I kept the oil there because I wanted to check my levels at my next gas station and see if I needed to add some.

Well, the oil spilled. I'm not sure how, but I think the car was baking in the sun and the pressure pushed the cap off. Or somthing. Sheesh.

I was then left with a puddle of oil in my trunk, all absorbed into the carpet. I realizes this at least 24 hours after it happend. I could smell it for a while, but didn't think that oil was leaking in my car. Well, this sucks.

I realized the oil everywhere when I popped my trunk at Kmart when getting groceries earlier today. I got about 200 napkins from the K cafe and cleaned it out. That took at least 35 mins of scraping at the cloth with paper nakins. I had to clean of what was in the trunk too.

The carpet is still soaked with oil, it's just not gobbed all over it anymore. I think I'll take it to a self-carwash and use the high pressure soap water to clean it (of course, take it out of the car first). Any suggestions?

I tryed leaving my trunk open to air it out today, but the light always stays on. I don't want a dead battery in the morning.