John's suggestion is a very good replacement for your existing antenna.
Here is another thing to consider...
If your existing antenna has been in the attic for 35 years, it's likely in the same condition it was the day it was installed. Unless there are severely bent or broken parts, it could easily offer another 35 years service.
You indicate it's receiving channel 13, KXLY from Spokane. That indicates to me that it's an excellent, high gain VHF antenna.
You may want to consider simply adding a UHF antenna. A 4-bay panel antenna such as the Antennacraft U4000, Antennas Direct DB-4 or CS-4, Channel Master CM-4221, or Winegard HD-4400 facing Spokane would easily fill the missing stations in your lineup. Combining VHF and UHF signals is easily done with an inexpensive
UVSJ. Especially in a tough climate like E-WA, the compact panel antenna would fair well if mounted in the weather, which is where it will have cleaner signal to work with.
Channel 32 will be an 'odd one out' given it's south of you. However, it may come in the backside of the panel antenna given it's higher signal level.