+1 on using the AMS ticketing office. I was able to successfully ticket my reservation (with 2 passengers!) with them this morning. They sent over a credit authorization form, which I printed, filled out, scanned, and emailed back.
Jakarta - Amsterdam ( First Class Cabin Service only) 19000
Please notice the total amount that you have to pay per person is EUR 202.09
Overall, the process was stressful (thinking that I'd not being able to ticket it and end up with with orphaned miles), but not that difficult.