Personally I would definitely not pair another male, while you will be dealing with PH either way at least with your DH male you have a shot at a visual, and if you change male your next chance of that might be another 2 years after (not all female lay eggs every year), so if that is your main project stay focus.
How big is your male and how much weight has he lost? When did you weigh him the first time after a meal?
Have you found them curled up together even if not locked, or were they each on one side of the enclosure when paired?
How about the female what behavior has she been exhibiting, feeding frenzy, cooling herself on the cold side, soaking or warping herself around the bowl?