Check
www.buykawasaki.com to match up part numbers from various years as well as aftermarket sites.
I don't think any of the 2005 models have any of those parts the same as the 2001 model. I know the rear wheel won't fit, as well as the forks.
The 2002 forks won't fit into the earlier clamps due to their larger size.
The RM and KX are not clones. You may want to read up on that some more. The Suzuki RMZ-250 was made by Kawasaki in 2004 and 2005. They had a technology sharing agreement for a few years. That was just on the four stroke, not the 250 two strokes.