I don’t know of it’s standard 1” or JIS.

Anyone know of any replacement forks available? Might have messed up dropouts on mine

Sun bicycles used to sell recumbent bicycles with a 20 inch front fork that had a long steer tube. Perhaps they or their distributor, J&B Imports, would have one in their parts inventory.

Sun EZSport:

Holy Rollers! Nice color! I like it.

-Shin

The problem with replacing a fork, is to find one with similar tire clearance, brake type, steer tube diameter and length, and also, geometry, as indicated in this example from wiki:

For example, that EZSport has very "laid back/slack" steering tube angle, which may have a corresponding offset/rake that will not work well with the more upright head tube angle on the minivelo. This all effects "trail/caster", which governs steering stability at speed, and wheel-flop when stopped. Plus the minivelos have really long head tubes, so you need a long fork steer tube, and hopefully you are using an aheadset setup so you don't need a threaded steer tube, but can just hack it off to the length you need and deburr the edge.

If you've got a Mercier Nano, try calling Bikes Direct, ask about a fork.

I had the same issue with mine. I rode it as-is for a while. The lever scratched the paint a bit. I kept riding it. Eventually it bothered me and I hit the lever with a mallet to bend it outward. Problem solved. That’s ridiculous to expect a whole bike to be replaced over one tiny part.