Just saw there was a talking about new digging items and such.
I can tell you that new items are being planned by now (saw it on Firn's to do list
viewtopic.php?f=1&t=7849 Look at the last thing on her list, it says "new digging item")
So I think there'll be new digging items within a few months...
I had a problem getting some of the items too, as my knuffels seemed not to like hats, so I made a trading station and traded one digging item for another to get all the different once and from now on, when it found some I'll just get more extras.... So I can just say, trade the items, then you won't spend FP on them and you can get ride of some of your many extras.
I have to admit, I'm looking forward to the new digging items, I miss finding new items....