Either you must get Ponyboy Rollie, but buy SW-68 Microswitches with each to have feel of Sanwa.
You could also get PS-14-K, the Seimitsu Snap ins, they accept SW-68 Microswitches, so it will be feel of Sanwa button. But they are impossible to find in White or Blue.
You could get Seimitsu PS-14-KN, the screw in, but they do not accept SW-68, so no feel of Sanwa. This is what most do.
The image inside is by cutting artwork and putting it in the button cap. Some people, like arthong, will cut artwork to fit Seimitsu PS-14-KN buttons. To see how put artwork inside: How To Mod The Madcatz Fight Stick with Seimitsu Parts. Pineconeattack! Steps #30?#40
To get Rollie, you must buy Ponyboy from Trading outlet. He will sell with SW-68 Microswitches. PS-14-K and PS-14-KN can be bought from lizardlick.com, but does not sell SW-68 Microswitches by themselves to put with PS-14-K. But PS-14-K colors limited. You want rare White or Blue, you won’t find easy. You will have to search hard for in those colors.