Thanks Brett

The standard factory pipes are made of steel and rust at an alarming rate.
We replace them with nylon based, fuel resistant pipe, as used on all modern cars, which does not rust.
We also use fittings designed for modern Porsche models to join the nylon sections to steel sections, which means we can just replace a section (back to where the original pipe is good) or all the way to the flexible fuel hoses at each end (which is a bit more involved, but ultimately means you have nothing to ever rust again.
Having said that, for the last 10 years, every 928 fuel pipe we have seen has always rusted in the same places, we see something similar with the 911's and 944's (also 924 and 968), as they each have places that the original coating becomes blasted away, which also means salt and rain is directed at the same locations, so even the ones where we have just replaced a section will probably never need the rest doing.
We do not tend to do it as a kit, but instead we normally custom fit them in the workshop, however I should really develop it into a kit for each model and sub model.
If you really can't get it down to us, we may be able to make a one off universal kit for you for mail order.
The benefits over the original pipes is
1 they do not rust again
2 they are cheaper than the originals
3 the originals often require removal of the suspension and other parts, in some cases even the fuel tank!
Glad yours are still giving you good service Brett, god knows how long they will last, in theory the pipe should be good even in 50 years and brass is used for the connectors for the same reason (will not corrode, ever) so, in theory, I don't think any 928 with our pipes will ever need replacement!