I used this for a search on ebay and found a few.
side marker 2005 chrysler crossfire srt-6 3.2l
I bought a rear one last month and there was a much larger selection. When I used the limited for the search I only found one. Maybe their search engine is not up to par today. I did not get any used to show up. When I was looking most of the used were more expensive than new. Someone with more Crossfire knowledge will have to weigh in on compatibility between models.