I acquired the RH front and rear floor pan pieces from Classic to Current a year or so ago -- for my 68 Wildcat but then decided to go a different route. Brand new. They sell for $65 each new, so $130 total. I'll take a hit and sell the pair for $65 plus shipping so someone gets good use out of them. Here is the link to the items: https://www.c2cfabrication.com/collections/all/buick+lesabre+1968 These should fit a Wildcat or LeSabre as this part of the floor plan is the same. Might also be fine for Electra. I'm located about 30 minutes west of Boston if someone wants to pick them up.
I have a 69 Electra convertible project. Like you said they may not fit perfect, but would be worth a shot. Would you ship to Iowa?