Where to get an old second -hand Medtronic bomb?

Hello,

Does anyone know in Spain where you could get an old second -hand bomb?

I would be worth any of these Medtronic models:
512/712
515/715
522/722
523/723
I see

I do not need a bomb, I have a much more modern Medtronic 640g, but I would like to investigate and try to set up this:

Link

It is a device to modify the basal pump dynamically, artificial pancreas type.I don't know if it will work, but well I would like to try.You can only use (for the moment) old pumps, since with the new ones, they still fail to connect to them to modify their configuration remotely.

Thank you

In Spain I think it is difficult to see for forums of Germany or the US perhaps for those worlds it is easier.