Are the Happs leds super bright???
Buy your LED's and the suitable resistors at a local electronic store. (you should've something like that there, or at least a mailorder in your country for electronic stuff)
Happ is much too expensive on this stuff, and if you've a soldering iron (or know someone who has one) you could save some money.
Maybe there is even a vendor in Portugal, 6 months after ordering from Happ I found a german-online-store that sells some of their stuff, too, at least the same buttons & joysticks. (I think there is even a arcade-factory in Spain, but they won't sell to enduser I guess -try to find out more, I don't remember their name directly, but it should be somewhere in the shop-section, they make the T-stick you can see on
http://www.ultimarc.com)
Though the buttons from Happ UK were still pretty cheap, I wouldn't get them cheaper here!