So I found out the reason I can’t find an oversize exhaust valve is because they don’t make them! .....Interesting you can get an intake oversized but no exhaust.......
Modern knowledge has found that older engines often have excessively big exhaust valves and do just fine with smaller ones. The spent gasses are still super hot and highly pressurized when the exhaust valve opens so they escape easily with the piston pumping to finish the job.
Normally aspirated induction only has atmospheric pressure (14.7 psi at sea level) to push the fuel/air mixture in. That's the basic reason that intake valves are usually bigger than the exhausts. Even lawnmower engines are built that way.
So consider this, fit a smaller exhaust valve to make room for a bigger intake valve? Not that I'm suggesting that for you, but some tuners do exactly that.