if you cant buy a kit, i.e. goodridge, venhill, etc etc, you can buy all the components individually from all over the place, but certainly ebay if you want an easy place to see good pictures and descriptions of what your components are.
the only difference with the self build is they will be an olive type compression joint onto the braided line, and not a factory pressed joint, however, the advantage to that is that you can build them with the exact route, length, and kink and angle that suits the application perfectly, whereas a premade kit, you often have to attach the body end and then prespin the caliper mount end several laps so that it sits in a reasonable route ince tightened up, because the unions don't have a spinning lock up.
bad description but do you get what i mean?
I bought a goodridge premade kit for my 155, mainly because it brand new in the packet and unused, and a snip at the winning bid on ebay, BUT, although it was the exact kit for my exact car, it wasn't perfect, in fact i had to shave off a proud lead in edge off every caliper end union, otherwise they would bottom out far before sealing and locking up,
not the best eh?
i'm used to making them up, from my time working on superbikes, and because of the fork compression we always found that a custom built set up was far better, with the proper length lines routed and angled appropriately, not chaffing on the forks or mudguard.
so custom fit all the way for me fella.
i think the original rubber lines are still available too, and would still be a vast improvement on elderley lines due to not balooning under pressure, i just cant remember where ive seen them, soz!
ps - top work going into this, well done again, she'll be a cracker by the looks of it.