Seeking Diagnosis/Treatment for Possible Nasopharyngeal Polyp in Cat

Our 5#, 18 mo old cat has been having breathing difficulty for about 6 months. We’ve been to two “regular” vets and one specialty vet. The “regular” vets have done chest x-rays and bloodwork trying to diagnose. We’ve been on multiple rounds of antibiotics, several steroid shots, and a few breathing treatments. The first vet suspected asthma, but none of the meds worked. The second vet suspected lung infection, but again, none of the meds caused any improvement. The cat is acting fine, eating and eliminating normally. No nasal discharge. Sounds like she’s snoring all the time.

We saw a specialist today. She determined that the cat isn’t able to breathe thru her nose much, if at all. We are waiting on lab results for a fungal infection. The next step she suggested would be for CT scan and rhinoscopy to check for foreign body, polyp, or other physical abnormality. I’m ok with sedated imaging, but their estimated cost for that is $4,000. I called MS State University Vet Clinic, and their estimate was also in that range. We’ve already spent hundreds trying to diagnose and treat this. I’m ok with spending more but not $4,000.

Can anyone suggest a vet in the Tennessee, Arkansas, Mississippi region that we can try?