I haven't found a way to get around it. I settled on carrying Salts as EDC knives.
You could try the DLC models. DLC makes the blade essentially rust proof aside from the exposed bevel in my experience, and on the Manix XL the liners are even coated as well. Very few DLC models from Spyderco also have coated liners, so the DLC Manix is about as close as you can get to a Manix Salt right now. There are a lot of cool options in the mini manix size, like the gray g10 DLC 52100 run. I'd grab an XL in that configuration for sure.
If the XL isn't your thing, the DLC Lightweight is about $85 I believe. They tempt me from time to time.