348 Challenge wheels and rear grill

I have been searching the archives unsuccessfully for sources for 348 Challenge wheels and the Challenge rear grill. Are these items "dealer only"?

 

Ernie

I stand corrected. I didn't know the name of the Speciale grill. The one I saw had no grills over the tail lights and what looked like a cooling vent in the center. The rear looked much cleaner and more aggressive in my humble opinion.

Tony

I found that grill (thanks, by the way) I was afraid that was a job I was not qualified for. Although I have considered the S.L. grill that was mentioned in the thread. I found their web page and I like the 355 look to the rear, but I am not sure if I want to change the character of the car that much. I found a 348tb on ebay that had the Speciale grill and I really like the look.

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&category=6212&item=2478972645&rd=1

I love the whole car but I am a little leery of it since there is so much done to the car and I am not sure of actual value of all the additions. Since this is going to be my first Ferrari, I want to make sure I get a solid one without any problems that may surface if I try to sell later. I am finding the TB's to be a bit rare.