Ring size availability

[Blownflatheaddeuce]

Hey guys,

I scored a semi fresh 59L flathead recently, it has a Weber F4 cam, adjustables, 4" crank and as BIG 3 7/16" bore. Everything looks good and I was wanting to give it a fresh hone and fresh rings.

Anyone know where I can get a set of these from ie Brand and supplier ? The pistons appear to be cast and have 3 7/16" stamped on their crowns.

Any suggestions ?

Thanks

BFD