Sure,,, pick the hardest one to come by... LOL
It is a matter of having some mechanical knowledge and basic tools. Due to the year and being foreign I am sure you will need Metric tools. Generally, mirrors are a pain to install only because of what you have to do to get to the mounting bolts. Not hard, just a pain in the butt kind of thing.
Out of 1800 yard this is all there was listed in inventory...
2005 Mirror-Door Lexus RX330 OEM ASY NICE,11 WIRE NTO $289
2004 Mirror-Door Lexus RX330 LH Ele, L, w/memory-GRIS IM $275
2004 Mirror-Door Lexus RX330 LH Ele, L, w/memory-AZUL NOF $265
2004 Mirror-Door Lexus RX330 LH Ele, L, w/memory-GRIS NOF $265
2004 Mirror-Door Lexus RX330 LH Ele, L, w/memory-ORO NOF $265
I own a RX300 so I am not too familiar with the color codes of your 04 RX330. The four letter description after the word memory I assume is the color option. Hopefully one of them matches yours. If so, you will not need to paint it. If you buy a new one you will need to get it painted, keep that in mind.
If any of these interest you just let me know. I'll call to confirm they still have it in stock and get a confirmed price and the shipping amount..