Your English is good. So, yes, your front OD bearing is gone, that's why you can't find that matching part. Hyun had 2 different front bearings (enclosed and open - and different sizes). It is likely you had the opened face needle bearing. Therefore, you likely have the correct front replacement bearing. It goes on the front of the hub over top of the new thrust plate (put the new thrust plate on the hub first, then the new needle bearing, with the needles facing outward - toward the planet carrier). Apply a small dab of transmission vasoline (get at auto store) to the back side of the thrust plate and then the back side of the needle bearing, so they don't move (don't shift position away from the hub holders) when the entire end clutch assy is lifted up and held vertically during re-installation ... and keep an ear for any movement. Also, replace the gear shaft, the end clutch seal, the clutches and discs inside the end clutch - you will have to press down on the concentric springs to relieve the pressure to remove the cir-clip, and the end clutch internal piston ring seals. And, remember to replace the double end-cover o-rings (from that earlier post). Regarding the end bearing, replace it, but also spin the original/old one and listen for play and wear, and check the bearing cage for cracking and the balls' positions for dis-symmetry. Make a video showing close-ups of the entire caging and both sides and also rapid spinning of the bearing assy, and let us see and hear that. Spin it fast. Regarding the lock nut washer, post a pic of the left side of the internals of the trans - what is behind the left side of the double-end cover. We can see the lock nut on the output shaft (transfer driven gear), but there's no pic of the input side (transfer drive gear and bearing retainer assy).