Welcome to the FZR World. That's pretty standard. Out of all the places that could possibly fix your bike probably only 25% of them will actually try.
The problem with our older bikes is that usually when they take them apart they find other problems. Or you get the bike back and something else has gone wrong or broken or cracked or dry rotted or God knows what. Plus a lot of the young technicians only know how to work on fuel-injected bikes. It boils down to liability, bother, and volume of business. Most places want to guarantee their customers a timely turnaround, so this helps them stay on time by not bothering with our bikes.
Fortunately there are still lots of shops out there with really good older mechanics who know what they're doing. I hope you find one, it took me about 10 years to find a really great mechanic, it's not easy.
So, we feel your pain brother.