Dan,

HeliDirect.com

I got the white ones and painted them silver. It's $19 and yes they are very durable. the plastic is simi flexable...hard and holds form but if you hit, they flex.....not like rubber or anything...just not hard plastic like the main frame that the motor mounts to is made from.

There is a black set...a bit different but the same type of unit. $12

It also comes with boom supports but for 18 grams I didn't think they did anything important. they connect to a thickass horizontal stab that is also useless in my opinion. I left them off.