I ended up buying the used JDM (Japanese Domestic Market) CVT Automatic Transmission from eBay. I paid around $300 for it and about another $300 to have it installed at a local shop. I've put over 30K miles on the transmission and no issues so far. These JDM parts are reliable because they come off low miles cars in Japan.
One minor problem when having it installed was with the transmission mounts because two of them had a slightly different mounting bracket bolt pattern. I am adding links to some images at the bottom so you can see what I mean. On one of the top mounts, 2 of the 3 holes did not line up. Even though just 1 bolt felt strong enough to hold the transmission I went to local weld shop and had them modify the bracket to align the other 2 holes. And then the bottom transmission mount bracket has a hole for a bolt that does not exist on this transmission, but it’s not needed anyways.
Make sure whoever installs the transmission uses new genuine Honda HG CVT transmission fluid. Can’t remember how many quarts it took when it was installed.
I change the transmission fluid every 15K. I just open the drain plug on the bottom, close it when it’s done coming out and then refill with about 5 1/2 quarts. The CVT transmission fluid is expensive, about $11 each at my local Honda parts dept.
1999 HONDA Civic HX CVT
33 mpg combined city/highway
1.7-liter Lean burn vtec
117hp / 111 torque
Spark plugs: NGK ZFR4F-11