WooCommerce plugin catalog numbers

Products on this site are listed by product numbers: https://www.theworldunhinged.com.previewdns.com/product-category/stamps/scott-catalogueg-i/gambia/
The client insist that they do not want to have to enter spaces into the category numbers in the titles (in the name of “efficiency”).
So, somehow, we need to add something to the product listing that will
override the normal alpha-numeric order. (like example below)
Example set of catalogue numbers:
7
9
14
28
56
102
456
3423
Of course, the alpha-numeric arrangement of these numbers would be:
102
14
28
3423
456
56
7

Would love some insight on this thanks