Doh too late,

Rally Design do the stainless ones for about 1/2 the cost of the same item at Demon Tweeks
NEVER be tempted to get those aluminium ones on Ebay - they are only reserved for Nova's as they are crap.
Paddy a small dent in the bonnet is better than a smashed windscreen and a large dent in the roof sometimes.

If they are fitted correctly then there is NO reason why they should pull on the panel. Our secret is to fit a tiny nut and washer under the inside of the rivit head when fitting (inside the bonnet)