It may be possible for allroundautomations to produce a 32bit thing which provides an API layer for 32bit plugins, but behind the scenes uses IPC to communicate with the 64-bit PLSD.
Alternatively, someone look at writing a ThirtyTwoSixtyFour plugin for the 64-bit plsd to do this. Said someone would need to be familiar with the complete PLSD API ...
The other option would be to offer to port plugins to 64-bit on behalf of their authors - but I think you'd need their source code. It might be just as easy for them to do this themselves, although for PasteOptions : see above. It's unfortunate as I really like that plugin so it's the only reason I'm sticking with 32-bit. I might have a go at writing my own standalone clipboard tool ... but don't hold your breath.