Close. That is where I got them but they were called "Forward Tactical Click Switch for Romisen RC-G2, RC-29". Don't see them on his site anymore but those may work as well.
Good news! I sent an email to Bryan @ ShiningBeam.com and asked him if he still had the RC-G2 style, and he went back and found a box of 50 of them that he didn't know he had. He has listed it on the website here.
I just spoke with him by phone as I had just placed an order today for the earlier discussed version which he said was a different size. He was able to change to this G2 version before it had shipped out. For future reference, he said that he can also order more of these.
They are so cheap, I ordered a "bunch" extra just in case they disappear again.