The information I am providing you here is from the receipt of my 10,000 mile service on my 2006 big dog k9.
The total labor was 4.50 hours. The total cost (parts and labor) was $471.82
The 10,000 mile service is higher than the others because the fork oil is changed at this mark.
Being that your bike is a 2003, the costs might be slightly higher than the cost I provided because the dealer finds other worn parts such as worn stearing neck bearing.
Hope this helps