Ron,
Good old rings for Ford V8's are 239 CI Engine.
The Bore size STOCK is 3.1875"
The ring gap is 0.009" to 0.014"
Width of rings is 0.91" to 0.92"
Gap Width is .009" to .014"
Take these details & visit your local engine reconditioner & they might be able to provide (suitable) replacements. If you are reboring oversize, you will need new pistons & rings, not just rings..
OR try
http://www.flatattackracing.com/ (hmm I am starting to sound like a broken record) I haven't bought anything from them yet as the budget is blown on waterpump rebuilds this month!
Oh and I am offering this advice, as its WAYYYY too hot out in the garage at 39C... Hmm wondering if it's over 5C in Canada...
Ian