That seems like the way to go. I ordered just the insert, from the original manufacturer (Royce Industries). The price for the 25", standard main tank sending unit (again:insert only) was $48.50. They promised it would go out within a day, UPS ground. After I didn't receive it one week later, I called back. The guy on the phone put me on hold to talk to the "manufacturing guy." He then informed me that it could be ready that day. This was yesterday, so we'll see. If I had it to do over again, I'd buy the whole unit at a chaper price from the above website. Live and learn...