72 K-20 Aux Fuel Tank

[BowTieBoy82]

I just picked up a 72 K-20 that had the factory optioned Aux Tank under the bed.... my question is does anyone make the filler neck for it... mine via the previous owner had a mild side swipe with a road sign due to a little too much to drink and the very outer end of it got distorted to where it looks like someone opened up a can of corn with a bowie knife and is beyond repair.... lmc sells the hose that runs from the neck to the tank, but not the neck itself, im almost debating on just getting an old tank from a junk yard cutting the end off the donor tank and then my filler neck and brazing it on there.... but preferably I would like to find a replacement..... any input????