Yea, and this is frustrating. Not only is it against the T&C, but there isn't enough time to do it when you are presented with a loan for sale. The ones I want to buy go very quickly.
I thought about slowly scraping, over a few weeks, to build a database of this info for all loans, so I'd have it in advance of them being listed for sale, but I'm sure this is precisely the sort of thing that the T&C was written to prevent.
I wanted to use the IGP info for another purpose. I wanted to calculate the rate at which IGP state propagates to worse kinds of late. I was thinking of my sell algorithm at the time. (I've since given up on sell algorithms. Now I never sell.)
I am unable to do that calculation, because the payment history file doesn't contain IGP, and there's no other way for me to get this info for all loans. The LC web pages have some numbers on this roll rate, but they only show the number for all loans, and I feel sure that loans broken down by various parameters (grade for example) will experience different roll rates.