Hi VM
If Bunnings still sell your model you could ask them for a price on a catcher.
How to do it at Bunnings:
Don't just look in the garden aisle: Go straight to the Special Orders Desk (usually near the entrance or front registers).
Bring your Model Number: This is crucial. For an electric Victa, look for a sticker on the deck (near the back flap or on the side). It will be something like PMA1840 or MEE1840.
The Process: Ask the team member to look up the Spare Parts Manual for that model. They can then order the catcher assembly (sometimes the "mesh bag" and "frame" are separate parts, so make sure they order the whole thing).
I've never had to buy one as I just modify one that is a close fit and get it to work.
Cheers
Max.