I don't think anyone does them that big off the shelf; that looks to be readily straightenable with a length of pipe and a vice. Where are you? If you're nearby I'll do it gratis.
Baseline Marine do drop nose pins ... but not sure about that size!!
They have one for a bow roller, you can check the dimensions here: http://www.baselinemarine.com/shopexd.asp?id=4468
Alan.