The following may not be of much help but I am speaking from my own first hand experience. I had the same concern as you when I bought my car 8 years ago. It already had a Red's double pumper setup since 2006 and I knew when I got the car I was going to run e85. Fast forward to today (8 years later) I'm still running the same double pumper setup on e85, perhaps not the smartest decision. Granted I did replace one pump 2 years ago because it's flow rate was diminishing (the pump never actually died) but you have to consider the pump was already 15 years old at that point. Most will recommend new pumps and replace them regularly especially if running e85 because risking blowing your shit up over an old pump you should have changed long time ago, is not worth it, and I would not disagree with that logic. But as with anything else, opinions will vary and my experience is just that - my experience.
FWIW, I've had conversations with other highly respected members of this board (Ttype6 is one that comes to mind) who have had similar experiences with Red's pumps in regards to the pumps ability to handle e85.
Lastly, fuel quality is another important topic that often gets overlooked. It can vary from State to State and is one reason why some run e85 with no issue and some only have issues with this particular fuel. I get my ethanol out of a sealed drum which can only help in terms of consistent fuel quality compared to the fuel you might get from some random gas station with some unknown additive package in it (the stuff they never reveal).
I already replaced the fuel lines. They got eaten up few years ago. They are E-85 enabled now! I plan on putting massive injectors in for E-85 and my goal to run mid 9's. No worries. The MSD-50's are old pump gas/alchy injectors.
I also plan on changing the chip to Bob's latest E-85 chip to match it all and upgrade the ECM to handle the massive injectors.
E-85 fuel wise I plan on getting fuel from the gas stations in Iowa which is the E-85 capital of America. It will be a street driver getting stuff from local pumps which all have E-85 here in Iowa. Most of the plants of E-85 are in Iowa. I can drive every hour or so and see an E-85 plant.
Iowa is the highest corn producer state in the US.
My old home town Denison, IA has one of the biggest E-85 plants on highway 30 which is one of my top visiting spots. So, I'm sure the E-85 is fresher than most places.
Iowa is the nation's leader in renewable fuels production with 42 ethanol refineries capable of producing 4.5 billion gallons annually – including 34 million gallons of annual cellulosic ethanol production capacity – and 11 biodiesel facilities with the capacity to produce 410 million gallons annually.