Hi Parrot1974,
Welcome on the forum. Your request remained unanswered. All experts are probably on holidays B)
I have a small group of P. Bintan since more than a year and confirm that yours pretty much look the same way as mine did when I just got them. Based on your 2 pictures I also believe that it’s couple. They seem to be very well fed. I’d advise a diet plan prior to breeding, and lots of dried oak leaves.
Good luck with them!