Floor pan replacement...

Just get the panels. Back in the bad old days we all had cars that got old traffic signs and the like pop riveted into the floors, just so we wouldn't have to "Flintstone" it because there were no panels available. Those days are gone. Save up the money and do it right. You might feel the need to get by on the cheap right now, but if you ever "up your game" on your car, you'll have to tear it out and redo it all over again. And you'll be cussing yourself out the whole time. Plus you will have lost all your reference points for the re-install... The only thing worse than having to invest the time and money in the job is having to do it twice. Just do it once, do it right, and do your best.