A partly free version (basic head shape only) is available on my blog:
https://dehaakhoek.nl/en/2020/09/07/halloween-head-decoration-crochet-pattern/

Pattern information
The head is made in amigurumi style, which means that you’ll be crocheting in a spiral. You do not have to close the rounds with a slip stitch.

This pattern uses US crochet terms:

MR = magic ring
Sl st = slip stitch
Sc = single crochet
Hdc = half double crochet
Dc = double crochet
Tr = treble crochet
Inc = increase (2 sc in indicated stitch)
Dec = decrease (2 sc together). Hook in next stitch, pull up a
loop, hook in next stitch, pull up a loop, yarn over, pull through 3 loops on hook.
2hdc-CL = cluster of 2 hdc. Yarn over, insert hook in indicated
stitch, pull up a loop, yarn over, insert hook in the same stitch, yarn over and pull through 5 loops on your hook
2dc-CL = cluster of 2 dc. Yarn over, insert hook in indicated
stitch, pull up a loop, yarn over and pull through 2 loops on your hook, insert hook in same stitch, yarn over and pull through 2 loops on your hook, yarn over and pull through 3 loops on your hook.

Work instructions between as many times as directed. Work instructions between ( ) all in the same indicated stitch. Stitch counts are at the end of each round, indicated by “- 6 sc”. Hints and important information will be displayed in red.

Materials

2 skeins Scheepjes Colour Crafter “2017 Verviers”
1 skein Scheepjes Colour Crafter “1246 Maastricht”
1 skein Scheepjes Colour Crafter “1123 Roermond”
1 skein Scheepjes Colour Crafter “1001 Weert”
1 skein Scheepjes Colour Crafter “1002 Eelde”
Stuffing
Crochet hook 3 mm (D)
Crochet hook 4 mm (G-6)
Scissors
Needle