Thanks JOHN & ALEX for the replies:
I thought it was odd that it didn't have the screen, being that every newer van I have looked at either in person or online had the screen. I suspect that the existing screen was damaged by closing the door and then was subsequently removed. The replacement assembly is priced right at $2200 without installation so a complete removal with a magnetic replacement seems to be a cheap work around. I would hate to have to fiddle with a magnetic screen every-time I stepped outside.
Not to worry, I have decided to move on and am still looking. The van was very clean, everything worked, had low miles, the VB-Air and everything else we wanted except the screen door. However, upon running the Carfax, I found an additional owner that the seller didn't disclose.
That in-itself I didn't figure was too bad, however, there have been two owners this year and the seller has only owned it for 2 months which didn't match up with his story about when he bought it. This led me to question the deal and I didn't want to get stuck with a lemon or having to explain the short ownership issue whenever we decided to sell.
SO, I DON'T need to know how to replace the screen door