In Flow, how to use values in record collection variable to populate record choice set?

I have built a record collection of accounts from multiple GetRecords steps, and now want to have user select and update one of them in a list with radio buttons. If I could pull that list in one query, I would just use record collectoin variable. Instead, is there a way to add records from collection into a record choice? Or can I build a custom choice with their IDs, and then update the one they choose?