Alix,

It might pay you something if you go ahead and total up your billings to them, any supporting documents, correspondences and send them along to the company and, if you have it, their lawyer's address.  There should be a bankruptcy docket number - file copies of everything to attorneys handling the work out and be sure to note the docket number.  Write up descriptions of services you offered, when you billed them, how long you've waited. 

Be assertive.  You may get nothing but it will only cost you copies and time (pick out weekend dates if your schedule is full).  You may be lucky, you may not.  But do something or you'll wonder in the back of your mind if you should have done something.  This way, if there's nothing left, you'll have the answer and know that you tried.

It's likely they'll have more than one secured creditor.  But don't let that stop you.  

 Best of luck.

Carol L. Clark