If you are asking where to look for rims, then try here.
https://www.universalcycles.com/shop...p?category=856
Check the filters on the top of the left hand sidebar. You can select to show only products that are in stock. They seem to have a lot of 700C rims. Don't know if any are 36 hole.
They also sell complete wheel sets and will custom build a wheel set for you.
https://www.universalcycles.com/wheelkit.php