Here is a UK vendor: http://www.gremlinsolutions.co.uk/ordersanwapushbuttons.php
http://www.gremlinsolutions.co.uk/ordersanwajoysticks.php
http://www.gremlinsolutions.co.uk/orderseimitsujoysticks.php
http://www.gremlinsolutions.co.uk/orderseimitsupushbuttons.php
