Perky-Pet® Dried Mealworm Bird Feeder with Flexports® - All Questions

I purchased a model#388F dried meal worm feeder last year. I really liked it but by fall the Flexports were pretty much destroyed. I tried using it anyway this Spring but I observed much more was falling out when feeding than was being eaten. Are replacement Flexports available? The feeder is useless without ports that work correctly.