Unless you want to replace all your memory with something different, I'd stick with Samsung.
Samsung almost always follows standard specification- and is considered by many to be the most solid memory brand.
The best match for Samsung would be either Micron or Infineon DDR333 CL2.5 modules.
Best to ask the vendor for "original", which comes with a module part number that can be verified on the vendors web page.
www.samsung.com
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