Hog Island Boat Works is the company that Caspian is refering to. They make rotomolded drift boats and do a great job of fixing kayaks. They have even succesfully fixed a crosslink boat which I have heard can't be done. It is a good way to fix a boat or make it useable for teaching, roadside colorado mank, etc. THey defintely aren't as strong as original but they work.
If you do it have them use the stainless mesh first and then the white plastic and make sure they drill out the end of the cracks so they don't run anymore. I worked with them quite a bit this summer perfecting their technique on my boat - they are good guys and do good work.
Whiskey's for drinkin' and waters for fightin'
- Mark Twain