Looking for some Guidance, Son damaged Rear 1/4, Looking to Flare? Options

[914coop]

Have a 1976 2.0 in good shape basically no rust. Purchased it as project car for us to work on together and we where close to sending it to paint last August and he backed into a fence pole. This revealed why we had to replaced a rear deck lid and a few other things as it had been hit in this area before. Damage is as as in picture.

(IMG:http://i972.photobucket.com/albums/ae209/ijcjr917/IMG00022.jpg)

Looking at possiably doing GT flares (Fiberglass), Right now considering these by QRS Fiberglass
.
(IMG:http://www.qrsfiberglass.com/catalog/images/gtff.jpg)
(IMG:http://www.qrsfiberglass.com/catalog/images/gtrf.jpg)

Have a bunch of questions.
Anyone used these before?
I am guessing the fenders would need to be cut off and these attached, Welded or other?
Other options?

This car will only be a daily driver just trying to keep it nice, Upgrading to the five bolt hubs abd if I can find a 2.7 911 to rebuild and add to it I would , but not a priority as the 2.0 is running great.

Thanks