Brake pipe questions

[Lippyp]

I was under the truck today sizing up what I need to do to get her back on the road and the brake pipes are looking a bit on the crusty side and no way will they pass its MoT (annual safety inspection) especially the passenger side one on the rear axle. My options are to import a ready made set, looking at Inline tubes prices I take it a full set consists of the short set and the long set so at $155 each set for mild steel and $185 for stainless plus shipping to the UK plus import tax etc makes it a very pricey option. My alternative is to either buy a decent tube flarer myself and make them up or get a local shop to make them, probably in KUNIFER (Copper, Nickel, Iron alloy) tube, this is less prone to cracking than pure copper, easy to bend and still outlasts steel by years.

What I need to know is what size pipe is used right from front to back, what size/thread the unions are as I'll be using new brass ones all throughout, I'm guessing they are standard double flares? I'll also replace the flexihoses and again may get them made locally so again what size are they/threads etc?

Thanks guys.