Same here. 50+ missions with 10K affection and +2 crit comps and have 4 thermal regulators to show. Only run "unsliceable" and "watching the watchdog". Others must have been lot more lucky course the price for the regulator on GTN is quite low (36K here), so there must be enough supply.
The reg on the Prophecy of the Five is hovering around 25k, which makes me both happy and sad lol. There are definitely the more lucky people. My friend gets them by the boatloads.