rice plot rubber boots large size

Does anyone know how to connect with the makers of the orange colored hip wader type of boots for farm work or the dark brown ones that a re knee high. I don't know if they are manufactured here in Thailand or China. But I need a very large size 14 I have been trying my best to search Chinese web for this type of rubber boot but my skill is certainly lacking in try to refine my searches. If those types of boots are made in Thailand there most likely would not be the size in need but if they are from China I might have a shot as they are far more body types there than here. any input or suggestions would be appreciated. 

Randell