cast manganese steel and its still used by the japanese army (among others) today. A firm based in Durham still make tracks for japanese contracts i enquired about this you see

they were flat out all with those contacts so could not assist me, but reckon from the belt of links i showed them, they were not a difficult item to cast.
the various quotes way is a good idea as folk may have they're own facilities to drill/machine the links, or have say a load of nos pins that could be used etc etc.
as for shipping if enough folk over the pond wanted sets made they could be shipped in one small container and money could be saved. Thing is the lucky folk in canada have better access to carrier wrecks than us poor brits so may have better luck tracing track that way.
At some point we are all going to run out of track bits!
Jeff you hit the nail on the head !!! and this goes back to my previous rant, we really need to think outside the box
now to ensure this stuff is available for
future generations to keep these vehicles rolling and preserve important memories / history.
i am confident between us we can produce a viable resolution to this issue.... like i say i can have stacks and stacks of pins made at a good price, as long as i have correct diameter and length to supply my old man (and the college)