You may find this video by Trace Velo helpful where he goes into details of a replacement product he substituted the Teflon for and has had good results.

However personally I use the Silca secret chain blend which although marginally more expensive than what he is talking about I have found last a lot longer than he experienced so it evens out cost vs distance wise, if not being slightly better bang for your buck and they claim is environmentally friendly with no Teflon :)