The Synclaviar was an early sampler/synthesizer and has nothing to do with guitar sound except that Mark used that specially-built Suhr to *trigger* the Synclaviar instead of a keyboard.
What you hear on the album is a mix of the guitar and the Synclaviar sound. For this reason you will not find a guitar effect pedal to create anything close to it. Instead you need a guitar MIDI interface to trigger some synth with a similar sound. That at least should be possible even with a limited budget these days. I think the Synclaviar cost something like USD 300,000 - today you can do what the Synclaviar did with any PC and software synths/samplers.