I have a few, but only a few (
https://triathletelife.wordpress.com/race-data-files/). They're mainly 70.3s though. I use a scraper to get the data. I'm not sure there's another way unless you have ironman contacts. I've written them and have basically been stonewalled when requesting data like that. So, I've just done web scraping to get it. I use google refine (I think it's called OpenRefine now). It's not completely automated, but it's not too bad.
I have several other races as well that I've just never got around to posting.
I've emailed guys that post large sets of data (Cox is one and there's another guy but I forget his site) to find out how they get it. They use scrapers as well. Or at least that's what they've told me.
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http://triathletelife.wordpress.com/