You can build a helical..tons of write ups and calculators...i built mine and am building more...or you can check ebay...IBCrazy has some really good ones (for the helical). For the 5.8 booster/amp you can get the Sunhans brand 2w..its pricey..or you can get the china black ones ones in 4w for less than half... my understandings are that the 4w china ones are equivalent to the 2w sunhans. I lucked out and won an ebay auction for $37 for an authentic Sunhans 2w 5.8ghz...thus is one that i made
