Jani, it took me a very long time to locate the 49->72 shade/adapter for my 18mm. As long as your willing to spend a princely sum of money, they do show up occasionally on EBAY. I would also check out (and join
. You can ask other members and see if someone wants to give one up. An alternative, is to put together some filter adapters, stepping out to 72mm, to approximate the Olympus adapter/shade. The only caveat, is to be careful about the thread gap area (between the glass and thread). This gap is very tight, and you want to make sure the 49mm portion is thin enough. The 18mm is probably my favorite Oly lens. I will try and measure/profile my adapter/shade this weekend and PM you the data.