I think I'll first order the shortest pieces possible of all 3 levels of stiffness and see which I like best and then make that request. The worst they can say is no. If I don't ask, the answer is automatically no.Call them. They might be able to get something close from one of their suppliers.
They were willing to order a custom hose from their supplier in Taiwan for me for an older first stage with a 1/2" LP port. No extra charge, I just had to wait for it to be included with one of their regular orders.