You can contribute by paypal - it is on the sidebar of the Catholic Leagues site here:
The Catholic League is now accepting donations towards the foundation of the Ordinariate through the Blessed John Henry Newman Fund.
All monies received by the Newman Fund will be donated to the Ordinary. The Newman Fund will close once the Ordinariate’s own systems for managing donations are in place.
You will find a permanent link to donate online on the right-hand side of this blog. For further details, please see the Catholic League’s blog, scrolling down on the left-hand side of the main page.