That link isn't working right. Just goes to performancecenter home. You can do a key word search for perma cool cool tek oil filter relocation kit...for a 1.8L 2000+ celica. It has a cooler, hoses, adapter, etc. for $56-57.
Yeah, you and bomber are probably right, but for every day driving with some periods of fun driving evry now and then, I bet this would be fine. Give you some extra cooling for hot days, etc. Just a better safety margin, provided the thing doesn't leak like a sieve.