Suzuki 2 Strokes

Am a carb repair newbie that's about to start working on 72 GT380J carbs.

Parts manual lists 4 different carbs for the bike. They are marked 33011 through 33014. Where are they marked?

Looks like the carb kits are for the later model (L/M/A/B) carbs.
Parts from Suzuki are pricey. (3 needle valves cost around $100.)
Any options to get reasonably priced parts?

Harbor Freight sells two different ultrasonic cleaners. Am going to get the larger one.

Am aware that you shouldn't clean floats in this cleaner.
Any other recommendations for a carb cleaning newbie?

If you just need needle valves you can buy Keyster kits which should have your needle valves and bowl gaskets inside but do not use the jets in the kit including the needle jet.

If all you need is to clean your carbs, you can soak them in Berrymans Chemtool Carb cleaner and blow out all passages.

I have never needed an ultrasonic cleaner unless you have other uses for the tool.