Can I suggest a cheaper option?
Buy a fine mesh bird feeder tray - a rectangular one is best - along with a couple of metal hanging baskets.
Remove the chains from the hanging baskets. Suspend the feeder tray in the centre of one hanging basket approximately level with the rim, by securing with cable ties. Invert the second hanging basket ove the first and secure the two baskets together with four small cable ties. Don't forget to cut off the excess lengths of the cable ties.
Reattach the chains to the spherical structure and hang from your bird feeder stand etc. Tip the bird food onto thr tray through the top basket. Clean the tray regularly by pouring hot water through the sphere and brushing with a long-handled dish brush or similar. Use some mild detergent for any stubborn stains, but make sure you rinse the tray well before adding the bird seed, suet pellets etc.