My son loves these, does anyone know a heather alternative in pouches like this?

Make your own.

Here's a link to some reusable pouches

https://www.amazon.com/dp/B07NVXSBRD/ref=cm_sw_r_cp_apa_i_L0jKFbXM7J75B

Trader Joe’s has some carrot apple ones that my daughter likes

Yes they sell organic ones of those but it’s a different brand