6.50 x 40 Inch tyres , Aus

Having just aquired a 16 Run Massey 500 series combine (seeder) on the weekend I am in search of a pair of 6.50 x 40 tyres, I think they were a type of multi rib originally.

I know they will be as rare as rocking horse ****

Have googled and 40 inch doesn't even get any hits.

Would anyone know the where abouts of a pair pls. WA pref.


Thanks

Arro

6.50 x 40 Inch tyres , Aus