WTB: Yellow L1/L2 buttons for Namco stick

As the title says, I’m looking to buy L-buttons for a Namco stick. I purchased mine without them, but the case doesn’t look right with two open holes.

Not sure exactly what they’re worth, but it should be less than or similar to a pair of Sanwa/Seimitsu buttons since they don’t have microswitches (but aren’t currently in production).
I’ll consider reasonable prices.