I believe that on the later cars (without the shutoff valve), it's just a length of plain fuel line hose between the hard line to the tank and the hard line to the pump. 5/16" od IIRC, available at FLAPS or P/N 115784 @ TRF. Originally no clamps, but I suggest adding them (I believe even TRA accepts them as a non-penalty "safety" item).
The hard line to the pump is ordinary 5/16" od fuel (or brake) line, terne coated steel. Should be readily available at FLAPS. About 8" or so IIRC, with a gradual bend of about 30 degrees. TRF has the nut listed 60142, but I managed to find one at FLAPS.
The tricky part is the sleeve. The original sleeves had a different profile than modern sleeves do, and the ones I've bought from both TRF & Moss in the past were not right. Modern sleeves are tapered at both ends, while the original was flat on the end next to the nut and only tapered on the end that goes into the pump. The extra taper slides up inside the nut and effectively makes the sleeve so short that it will not seal properly before the nut bottoms into the threads in the pump. Overtightening the nut (in an attempt to stop the leak) can actually break the pump casting! That's been some years ago, so it's possible they have had sleeves made in the correct pattern, but I doubt it. Custom made parts would cost a lot more than $.50.
Several approaches you can try to deal with that. On my (previous) TR3A, I carefully filed the last thread off of the nut, so it could go deeper into the pump and compress a modern sleeve (readily available at Home Depot, etc). Another approach is to wrap teflon tape, or valve packing, around the line between the nut & sleeve. Perhaps the most elegant solution is written up here
https://drive.google.com/open?id=0B2H2NJt34OffODA0ZmI4YTItNDhiZC00YmMzLTllOTUtZWVjN2U5MTUzZjA3