Hi Billz. Generally speaking, the plan mileage limit chosen affects ESP pricing more than the number of years. And also generally speaking, Zeigler, Granger and Flood seem to offer the best pricing, although there can always be exceptions.
Therefore, work up prices from Zeigler, Granger, Flood, Lombard etc. Also from your Dealership and other Lincoln/Ford Dealerships in your area.
And you can find more online sellers by Googling ”Lincoln ESP plan sellers”.
You can work up price estimates until you’re satisfied you got the best plan and price for yourself.
Just be sure to work up apples to apples comparisons, since there are several plans levels, various time/mileage coverages, optional coverages, deductibles etc.
However, the Lincoln factory ESP is a better choice than third party ESP’s.
Let us know how you make out and good luck.