No insurance and my Medtronic Pump died - where to get a used pump?

I’m a 62 yo T1D of 40 years. My 10 year old Medtronic pump has failed and is out of warranty. My insurance doesn’t cover pumps and I don’t have the $8,000 to buy a new one. Can anyone suggest a source for a used pump? Does anyone have an old one they don’t need? I can pay something. I’m tying to get by until Medicare kicks in. Thanks - appreciate any ideas!