Seimitsu LS-30 rotary stick

[matrigs]

http://www.arcadeworlduk.com/products/H ... tton.html#

not sure if that's exactly that button, though.

but i have ordered from them before and everything was fine.

[emphatic]

With a regular yellow HAPP/IL style button (not competition):



If you get the convex HAPP Competition button, it should look even more close to the original SNK branded tops. Where in the world are you located? Searching eBay for "Yellow arcade pushbutton" gives you plenty of cheap options.

Here are my findings on the LS-30: http://www.emphatic.se/?p=991

[emphatic]

Nice work!