The Great Amusement Emporium only sells to operators and has a $200 minimum order. The longtime operator I worked for had me order from them all the time. Their prices were very low plus in some cases, they manufactured their own parts for things other companies no longer supported. Those Midway "entry chutes" are one of those items. They also had pinball machine coils made under the "GAME" brand for Atari and Game Plan machines that nobody else had or carried.
The Great Amusement Emporium has a huge catalog in a giant 4" three ring binder that makes it easy to update. The catalog is printed without prices. You look in the very last section with the pricing. Simply look up the item number and there's the price. My friend has a catalog.
If you're friends with a local game operator and that operator purchases from the Great Amusement Emporium, maybe you could talk them into ordering some parts for you.