Up for sale here is this NOS vintage Micamold wax capacitor, from the 1950s and Made in USA. It is marked .022 uf 400v, but will test a bit higher. I tested a few of these, and they tested around .027-.029 uf, with a surprisingly small amount of leakage. This should work fine at full voltage. Please see my pictures for details and sample test results.
US shipping and handling is $5, and international is $18, no matter what quantity you buy. All my small parts are set up for combined shipping, so just use the "add to cart" feature and then check out all at once, and it will combine shipping. If you have any questions, please ask.
I have more capacitors and other vintage electronics listed--feel free to take a look!