Below are antique cast iron wheel options that have come in from my pickers across the US. Click images to enlarge.

Unfortunately, most are larger than you’re looking for, but hopefully they have merits that may make them appeal to you and your client.

All are in as-found rusty condition, but good structural condition.

Cited pricing is for wheels only. Shipping cost additional. A rough calculation on the US Postal Service website shows I can ship up to 4 pounds (2 smaller wheels?) for 50 USD, and up to 20 lbs (a couple sets?) for 100 USD.

FYI, these options are currently being offered for sale by their owners, so they can become unavailable at any time. It could take up to a week for me to acquire one of these sets. Of course I can continue to search, but I feel I’d need to request a deposit, since this is taking a bit of time and energy. If so, your feedback on these offerings would be helpful.

Also, plan for 2-3 weeks for delivery. Package will arrive in Australia in a few days, but can then take up to 2 weeks for processing by your Customs office, and then it goes into the hands of your postal service.

Thanks.
Hylton