But here's another couple of ideas:-
If your list is not too long (and Huw is happy with the idea) why not get it tacked up, and invite "bids" (donations, whatever) right here on the forum?
Failing that, you could set up a website or blog and get your requirements listed on there ... with a link from this forum in order to "spread the word" - right across the world.
After all, there is (I believe) quite a thriving market in parts for medical equipment in the part of the world where you are. Malaysia, Indonesia, the Philippines ...
etc.