Canon USA has updated the
refurbished gear inventory,
with notable inclusion of the RF 100-500 and RF 70-200 F2.8 lenses.
Get one for each of your EF lenses: the refurbished Canon Mount Adapter EF-EOS R with and without the control ring is in stock at
Canon USA for only $127.99 and $63.99.
Expect Canon USA refurbished items to be like new with an as-new warranty and a great price.