So my G38 has a wt-338 carb on it. i need a new one but cant find that model any longer.

Several of my older piston ported engines got Walbro carbs intended for various Chinese engines. In your case one for something like a DLE 30 or 35, Stinger 35, etc should work just fine. You need to know how your carb gets the crankcase pulse to run the pump. If the current carb uses internal porting, just bolt on the new carb and you’re good to go. If currently external port, you might have to reuse the pump cover from the old carb on the carb and be sure the internal port is plugged or that there is no port hole in the carb gasket. You could also install a pulse port tap in the new carb. Sounds complicated but is extremely easy. Valley View RC and Mile High RC are good sources for replacement carbs. In every case, replacement carbs have run and throttled better than the old ones did.