Hate you Red, just decided.
First the Nessmuk, and now this -
Sumatra-Raja-Batak-Lingtong
Love Java coffee, and this seems to be the top end stuff. Oddly, I have found the cheaper I have paid the better the coffee tastes. The Whitard, and the starbucks Javas, both pale when compared to the Tesco's cheap brand, and my current, just purchased Aldi brand is the best so far.
One quick point, if you do not like strong coffee, avoid the shop Javas, they tend to be their strength five coffees.
For in the wild have a look at this thread, this seems to be like what some of us were trying to work out in the last coffee thread.
CapheVn Coffee Filter
The person on ebay selling, lead me to a google search and there are two different companies at least selling a similar idea, but might be worth a think and some diy.