Actually, I do believe an inkjet exchange would work, as this is not the first time the topic comes up in the forum.
Organising it is easy: As the exchanges are all "user organised functions", you just do it. If you like, you can have a look what piu58 and I (mainly copying from piu58) have done and modify the way you like. Generally, it is a good idea to have something like a FAQ for your exchange and then a separate thread for each round of the exchange. If you have any questions, you can contact me anytime.