fibreglass

As alot of people who own Cupra's are i am looking to buy the Cupra R bumpers.... are these worth the hassle?? http://cgi.ebay.co.uk/SEAT-LEON-CUPRA-R-FRONT-BUMPER-LOOK_W0QQitemZ220574926541QQcmdZViewItemQQptZUK_CarsParts_Vehicles_CarParts_SM?hash=item335b4a46cd#ht_2145wt_1165...

ive been looking for cupra R kit for a while now and it looks like they are going for a lot of money so was woundering if anyone has chanced it and gone for the fibreglass kits you can get on ebay ? ino it wont look spot on like the genuine R kit but may look ok still ? what are your views...

right i want to mount some tweeters into my A pillers for better vocal responce. i have had an idea to cut out a hole in the A pillers big enough for the tweerer, then fibreglassing it to make it smooth. i have no idea how to fibreglass and do it all myself, does anyone know where i can get...