Yes, you should be able to get a quote over the phone. You'll need year, make and model. You also need off the axle itself, the manufacturer numbers and serial numbers. A dealer may need a little time to check with axle maker for a replacement, but it only takes minutes.
Better yet call the axle manufacturer yourself. Your sign shows you are in Ill, just a few hours from Elkhart/Goshen In. We are going north in Aug, I called the manufacturer that made ours, give the numbers, the person I was talking to, replied right back with a price for the new axles and approximate price for changing them as it does vary from one unit to another, (we are changing from 7,000# to 8,000# axles).
Hope this helps,
Mike and Judy
Wherever we are parked is our home
2009 - 36RD5S
2007 - Dodge 3500 6.7 Cummins
May God bless