CrossRoads:
I believe the buttons will fit as is, no manipulation needed.
P.S. I will (most likely) buy these buttons. Thanks for the help!
Answer 2:
CrossRoads:
Search for switch at taydaelectronics.com, lots of 4 pin tactile switches to choose from.
I have some 2-pin tactile switches like those, no idea where I got them.
Checked all the usual sources and am not seeing them.They look like this
http://www.mouser.com/ProductDetail/CK-Components/PTS635VH39-LFS/?qs=sGAEpiMZZMsgGjVA3toVBBpDTNTTW0j3YRB1%252bcCi%2Fno%3D