CGM for insulinoma

Hello! I’m new to this thread so I’m sorry if this doesn’t really fit in.

I have a suspected insulinoma, which is proving to be an extremely long process to be taken care of. I received a 10-week supply of Freestyle Libre 3 sensors from a friend who had a total pancreatectomy and had swapped to a Dexcom and it has been amazing and so useful. I have United Healthcare insurance and they only cover CGMs for people with type 1 diabetes or type 2/gestational if they use insulin. They won’t even cover test strips for a glucometer.

I was wondering if anyone knew where to get CGM sensors for lower prices? I don’t know if Diabetic Warehouse is legit or if GoodRx can help cover some of the cost out of pocket. The CGM has been life-changing in helping me manage the hypoglycemic episodes and I have 4 weeks left so I really don’t want to stop. Any suggestions?