i have a manual trailer jack that is mounted to the side of my trailer. I’d like to replace it with an electric one but I’m having difficulty finding one that mounts the same way. All the ones I’ve seen mount on the center of the tongue. Any one seen anything that is side mounted?

You will likely need to have a "saddle" fabricated so you can use one of the typical ones that mounts into the A-frame of a trailer. I bought a jack several years ago, and was going to have such made, but sold it before I could go further.

Few options from brackets to side mount a normal electric trailer jack to electric trailer jacks made to side mount.

Hope this link works:
https://www.bing.com/images/search?q...4E537EFAE40660

This is VERY similar to what I had sketched up several years ago:

I did some digging, and that product is not listed on that site anymore.

Here is what LoadMaster welds to their trailers:

I had Myco make me up the metal part that they weld the electric jack to, as I wanted to add it to a couple of our Mycos that we didn't originally order them with. The plate was around $35 or so if I remember correctly and I then had it welded to a 4,000lb electric tongue jack from Amazon and had it painted. Looks identical to how it comes from Myco.