Due On Sale Insurance and Subject To Servicing

[Matt Huber]

On the BiggerPockets podcast episode 527, Pace Morby explained that there are companies that provide "Due on Sale Clause" insurance. I've Googled a bit, but can't seem to find any further information or providers of this. Does anyone have experience with something like this? 

In the same episode, Pace explained that in a subject-to purchase, you can have a service company collect the payments, and in that way the seller's DTI could be relieved of the subject-to payment amount. Can anyone point me in the right direction for this kind of service provider?

I'd love the chance to talk to somebody with experience with any of these tools and strategies.