Do you make 6ft or 8ft boards either 4 ft wide or 5 ft wide? 6ft x 5ft or 4ft 8ft by 5ft or 4 ft If so what is the cost?

Wedi does make 5' and 8' length boards but they are not as wide as you would like, so you would have to buy two and combine them for your project. Wedi has a 1/2 .in by 8' by 4' board for $117.83 or a 1/2 by 5' by 3' for $47.14. Shipping these boards does get expensive as the larger boards must be put on pallets for shipping.