repair a fabricated fiberglass shower

[Spfrancis]

I'm looking to see if I can use one of these pan overlay replacement kits that will seal over this crack that I have in my pan. I'm looking to hold off of on having to completely replace the shower enclosure if possible. I wanted to see if anyone has had experience doing repair on a cracked shower floor. I tried using flex-shot, but I don't trust that this will be a longer-term fix. My plan is to completely gut the bathroom in 3-5 years, and I didn't want to throw a bunch of money at this shower, if I can make it last for 3-5 years.