I quickly scanned this thread so sorry if I end up being redundant.
Here is a CPN article from 2000 on this subject.
http://www.carnivorousplants.org/cpn...NepInorSub.htm
I tried it once, but my problem was I got lax in watering , and obviously with a mix like this, you water much, much more often then usual mixes.
Note the authors use Osmocote to mack of the breaking down of organics.
I have been using a mix of garden center mulches here in the US. I like using different ones together, as they have different shapes and make it a little more open. I am using pine bark mulch, cedar mulch, fir bark and cypress. I also put in charcoal, perlite, lava pebbles , coco husk chips and um, a little sphagnum. This is equal parts, so the lfs is only 1/9th of the mix(even at such a small dose, the cedar smells really good!)
I am not sure if the sphagnum is needed, as this mix seems to hold water very well and drains freely.
Obviously, this is not inorganic with all the wood products, but mulch is used by the tons for landscaping, etc, and is more renewable than lfs and peat. I would imagine there are a lot of local tree products that would work in Nepenthes mixes anywhere.
Cheers,
Joe