I'm happy to announce, and I hope I don't regret it, that we can email PDFs to MBC. And they will print them, and the drawings will probably be alright. I'm sure there will be some tuning up to do, but I think we have it working.
This is the address. Put the job details (copies etc) in the message. The file size limit is 50MB.
Let me know if you have any problems.