HELP! Giant tcr sl isp cracked.

Dan55 Posts: 2
edited September 2015 in Workshop
I have a cracked giant integrated seat post on my 2010 giant tcr advanced sl which I bought and got ripped off with, but that's a different story. I have quotes to fix this but part of the problem is the seat mast being maxed out with spacers and the leverage from that has caused the damage. I have been told that I need an isp off cut from somewhere to mould to existing seatpost so seat mast will still fit. I was wondering if a giant vector seatpost is the exact same shape as the integrated seatpost from my bike and where can I get an off cut from? Any suggestions greatly appreciated