So I finally managed to find the instructions as you can see below, buuut they're not in English. The picture seemed pretty self explanatory but I typed it all into Google Translate anyway XD Turns out I didn't really need to but never mind.
You can find the post with the instructions here and the original post that I found is here. I ended up doing a little hybrid between the two and I put beads for the eyes and nose. I was thinking about sewing eyelashes but thought I'd probably mess it up XD
Basically you cut out the template, sew along the body and pull it together to make a ball, stuff it with pillow stuffing stuff, Sew along the head bit and make it into a cone, and sew on the eyes and nose. I sewed on the ears after but you could probably do that now. I decided to do a blanket stitch around the face and the bottom as I thought it looked cuter but it's personal preference :) And then you somehow neatly sew it altogether, that's where mine went a bit wrong, but it's cool, it makes it look handmade and not that I've bought it in a shop :')
And that's it! Probably shouldn't take you a day like it did for me but nevermind haha! I forgot that I was such a slow sewer! I guess you get quicker with practice, but I'm quite proud with my little stitching XD The face is a bit wonky but never mind :')
So yeah, there's my little porcupine pincushion. Link me below if you've made any pincushions or if you try this one out I'd love to have a look! :)