Jolida Fusion Preamp Op Amps

I’m hoping somebody can answer a question about my Fusion preamp. I bought this heavily modified unit a while back and I’m very pleased with it. It came with DEXA DX2010 single discrete op amps installed. I would like to know which op amps came in it from the factory. I’ve searched everywhere and can’t find any info other than it came with low priced op amps. Big help. I emailed Jolida but got no response. I’ve been looking at Sparkos and Bursons to maybe try something new but don’t know which versions to research because I don’t know what came in the Fusion to start with. I’ve tried to find info on what corresponds with the DEXA but haven’t had much luck with that either. Can anyone help me?
Thanks,
Sam