From their announcement:
In response to our customers wishes we have now introduced our first pay-to-download ruleset on 15mm.co.uk, Huzzah!
You can now purchase USE ME in a purpose made electronic format for instant delivery to your computer.
UM001 USE ME 15mm Science Fiction
(Zip File containing full colour bookmarked and searchable PDF plus a plain ‘easy print’ version for home printing). Only $5.00 USD via Paypal with our online provider Oronjo.
Go along and get your download now.