Keep the list, it's okay to be selfish. I feel your pain with these crazy trips, have done quite a few myself.
You can always help the community if someone is asking specifically about a part, then you can PM this person the location of a suitable car, or go get the part your self if you're going that way..

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Tomas, Sweden
1966 Mercedes Benz 230S with OM617.912, automatic. Disk brakes from W108
1983 Mercedes Benz 300TD grey, OM617.912 and 5-speed manual
1983 Mercedes Benz 300TD blue 7-seater, OM617.912 and 5-speed manual