I'm interested to know from others who have been through the process of trying to find harder to find pens what methods have worked?

The pen I'm after is is a Diplomat Balance B I've got 2 Balance C but I want a larger B as well. I was hoping to buy one a few years ago it was discontinued under my radar. When I went to look there weren't any stockists. I think it was discontinued in 2016 so I don't think by means it should be an impossible task to find one in new or very good condition.

Other then searching Ebay.de and occasionally amazon are there other methods I should be trying? I tried Diplomat themselves around a year ago but they had non.

I fully recognise it's a sellers market with these sorts of things however I haven't even seen anyone hedging there bets for one.