David,
This one looks like it sits quite snug
https://www.forbbodiesonly.com/mopar...01-jpg.532225/ .
For what it's worth, the height of your carby is the same as mine - 3.250 in.
Also bear in mind that the bonnet is higher in the middle than it is at the sides where it meets with wings.
If you are prepared to take the plunge and buy a secondhand one on eBay, at least you are the in the right country
. If you do find one that fits, you can probably get a replacement post for the centre of the carby. It looks like you could buy a period single snorkle air cleaner for around $100.
Kevin