Thank you for responding all of you. Not sure how to measure what Sixty Fiver is asking, my English is not good enough. Visited the wikipedia page and links earlyer today. Lots of info, but no solutions.
I think it is sooo strange that nobody made a easy solution for this! Somebody said there is a solution, but since he cannot tell me exactly, just that it should be possible to buy from most online stores, then I cannot use the info. Problem is most online shops do not tell you both mesurments, just how wide (68-70). Found one cartridge with no threading somebody said I could use, and I agree, but again they did not tell me all I need.
Sent e-mails to a few online stores, hope they answer me after easter.
Made a desicion what to do, need some few days to finish. Did alot of filing today (want to see my blisters?), need to take out the angle grinder, but must wait until after easter. Been looking for my Dremmel today, could not find it (so I made my first attempt on making a wheel from a 28 hole rim and 36 holehub instead. Turned out well, but need some shorter spokes).
I`ll post some pix of my solution in a few days, struggeling with some crappy laptops, cannot bring myself to finish repairing them, so pix is a problem at the moment.