I have an idea!
OK for those people who for whatever reason find that they can't honour their committment to the Blind Print Exchange, why not send the print your received in lieu of your own print?
This way, it pretty much annuls you as a particpant in the round - you don't get a print; and you don't need to make a print.
All you have to do is repackage or re-label the print you received and send it off to the person you were suppose to send your print. Just don't claim the print as yours.