It could be writing another order in order to obtain particular information once you've identified that someone is actually in possession of it.
Policing is a community, so at times, you can reach out within your community to try to identify whether anybody has received a particular type of information from company X that has spoken to what evidence is required. That might be one way to do it, and then go through another order to produce.
There is, I suppose, the option of going back and finding a Crown counsel who would be willing to support your additional request, citing that whatever was required in the order to produce was not met or was not produced. There are some options. Like I mentioned, another one is finding another source for that particular type of information.