sable female collie looking for stud

Breed: Rough Collie
Location: MD
Date of Birth: 11 February 2021
Age: 5 years, 6 months, 18 days
Bitch (female)
Pedigree: Yes

Details:

I am looking for a stud for my female rough collies, she is MDR1 affected and a carrier for CEA (so the male would have to be CEA clear/non carrier). preferably looking for a tri or tri-factor sable.