I was having the same problem. I finally found the three hoses I believe you are talking about at K&K Manufacturing in Michigan. I am about to order them myself. Hose fuel line to filter with two fittings: 108-476-00-26. Hose fuel injection return: one fitting and one open end, 128-476-07-26. The other hose is to the damper at the fuel injection pump: two fittings, one is a banjo fitting, 108-476-02-26. Before ordering, I would verify that this is all correct. I also own a 1966 230SL that I am currently changing out all of the fuel related items.
NOTE: If you still have the original fuel pump which I have, the hose that goes from the pump to the fuel line running up front, 113-476-09-26, will be about 4 to 5 inches short. At least that is what I received from Autohaus. My guess is that particular hose is being made for the smaller pump only, or the replacement pumps. When I contact K&K to see about the fuel lines for the engine compartment, I am going to see if they still have the correct hose length for the old fuel pump setup. Kind of odd that they would not make the non fitted end a little longer so that you could always cut it to length.
Anyone have any idea as to a modification of the short hose? Or better yet, does anyone still sell the correct size? I would hate to splice an additional piece of hose onto it to make it fit. After all, it is the main hose from the pump to the hard line going up to the fuel filter.
Tom L.
