Resurrecting this old thread to ask if anyone has found a good answer to this. (I'm really relieved I'm not the only one who misses these things, even though I guess they're meant to be for kids!) My amazing mother has just sent me a Christmas box and included My Little Pony (!) fruit snacks and it made me realise how much I miss them.
I gave some to my flatmate and asked him to try them and he suggested I get some jelly sweets, like fruit gums or Randoms, but I've tried them already and they're not the same! And now I'm dying for some Shark Bites or Gushers.