Hi there

Ages ago (well in the 1980's) I used to buy MCO's quite often at the local IATA travel agent down the high street. They would happily sell you one, if i recall they were a standard ticket on IATA stock with VOID in the origin & destination fields. i would save them up and when i had enough for my required airline ticket, I just went to the airline office or IATA agent and handed a bunch of them over the counter and got a proper ticket, either paying cash for any excess amount or recieving another MCO for any balance remaining.

Cheers
vflyer