Just wanted to circle back around on this. We've done a bit of investigation, and have good and (possibly) bad news.
First off, we've updated the Apply button to work with a custom company name and will be included in the next release. We also tried doing the same for some of the other widgets, but they don't work with those. There is a way to do a real-time lookup (search) based on a name to retrieve the actual Company ID and use that.. however, that lookup is not quick and not something we'd implement due to performance concerns.
Hope that helps. If you need a solution 'now', just let us know and we can post the necessary code change. Otherwise, just wait a little bit for the next release.
Thanks,
Alex