F-Mode Flatform Slingback Sandal (Women)

I've worn Fit flops for years, but last year I found that I could no longer wear ones with the toe post. I read up on why, and it seems that for some it causes stress and arch pain. So I went exclusively with my black sparkly Lulu slides, made out of soft, pliable material (like old fashioned flip flops, only not flat). I've worn them out so I went on line to replace them, but they seem to be no longer available. I tried this style, but the insole is a leather like surface that does not grip the foot. My foot slides slightly when I walk,so the arch support is not always directly under the arch. Why can't we have the nice soft inner sole? I could rinse off the original slide, slip my foot in and out, in short the perfect summer sandal. I don't need a dressy, leather like shoe for everyday summer (and beyond) wear. I need the sturdy, substantial sole of the Lulu slide in the soft forgiving foam.