Fuel Bladder

Recently We get a U.S.A customer who requires about a 30’’ * 12’’ * 8’’ fuel bladder. We send a picture of our fuel bladder to the customer for reference, please check the following picture, After checking this picture, the customer said"It is very nice and that what we need.". But the customer asks us a question "It is possible to relocate the filler port to a corner". And send to simple drawing to us for reference: “This is a ...