Where could I get an ultrasound for my dog?

My dog has elevated liver enzymes and his current vet has indicated the only way to identify the issue and resolve is to perform an ultrasound. They quoted about $1000-$1400 for just the ultrasound because they don’t have anyone onsite and need to bring in a specialist. Does anyone have any idea if there are other vets in the Miami area that are more cost effective? Pet insurance has already denied coverage due to preexisting conditions so all of this will be out of pocket for me.