Because the BX (Double bias) carbon is hard to get, the other alternative is to wrap unis around on a 45 degree angle.

Laminate schedule would be some thing like:
Outside
Carbon unis at 45 degrees (clockwise)
Carbon unis along mast
Carbon unis along mast
Carbon unis at 45 degrees (anti clockwise)
Core
Carbon unis along mast
Carbon unis along mast
Carbon cloth (0/90)
Inside.

Disclaimer:
This is not an engineered solution just a starting point.