Question on inputting as PDB/structure files rather than .fasta for multimer predictions

Hello,

We have been using Alphafold in order to predict protein:protein interactions using the multimer function. In this case, quite a lot of the processing time is taken up by folding a protein sequence for which we already know the structure. As we are more interested in protein complex formations and interactions, is there any way to input PDB files (or similar) rather than .fasta files and effectively bypass the protein folding steps?