SmallWeb offers Domain Registrations and Domain Transfers on a manual basis.
It's not a big service of ours, but if you would like the convenience of hosting your website domain with us (through CloudFlare) you can.
Open a support ticket detailing the following:
You will then receive an invoice for the domain and it will automatically be connected to your linked SmallWeb service, or one you request.
The cost of this will depend on your payment method and domain extension. You will be charged what SmallWeb pays plus paypal related fees.
Please note, as of 26/08/2019 CloudFlare only allows the transfer of an existing domain.