Wanted: Carbon, short, high degree, oversized stem

Hi guys

I am looking for a stem for my road bike. I just did a massive ride and my back was spasming out.

1. Oversized - no option, has to be oversized
   
2. short - Less than 100mm preferably 60mm or 70mm
   
3. degree angle - 15-20%
   
4. Carbon. (i suspect this will be impossible, but i really want this to be carbon)
   
   

I need to bring my posture up and back a bit.

Cheers for any assistance