For the cost of even a second hand one at about £500-600. Payed £550 for mine couple of years back. I would just go buy a Tegiwa Replica at £400. Although I have to be honest Im not usually one to advise to buy tegiwa stuff.
But their manifold seems to be quite a decent piece of kit.
Although if your set on the Toda then Best of luck . They are certainly a great manifold.
Toda manifolds are certainly hard to get hold off, it took me ages to find one to the point was considering buying new lol, they are the best manifolds u can buy.
I have one available but its the race system off a DC2 so all slip fit no flanges and DC2 length exhaust (its a complete system, mani and exhaust). Oh and all inconel so do get easy ideas about cutting it up and modifying it