Boyds gunstock in the USAalready produce sporter stock for the Lee Enfield and also full military stock for the Pattern 1914. I'm guessing adjusting their program for a full length Lee Enfield forend would not be too difficult for them since they already have the rear inletting portion figured out. I tried sending a request on their ''request form'' but if not enough people ask for them it might be futile.
Like you said... a lot of people want them at 1990 prices.... not gonna happen.