@wakabayashi: I see your point. The only reason I'm not writing it as "artist - album name" is because I need to be able to export csv files with the two fields in their own columns. Otherwise it would make my life so much easier also with friendly urls, how it appears on invoices etc...
@zimmer-media: I'm going to use either manufacturer or supplier as the record label, haven't decided on which one yet, but I guess I could use the one left as my artist. I'll look into that. I've already added my own custom field, as mentioned in the post you link to, so it's not a problem for me to edit that list and add extra fields if needed.
It still doesn't really solve my problem though as either supplier or manufacturer won't come up in the results when I create orders. The ideal solution for me, no matter which kind of input field I use, is that both artist name and album name come up in these results.