If I was using a real tube amp to try to dupe this tone... a Peavey Classic 30 or Princeton Reverb would be the place that I'd start. Look at the Fender blackface amp models (deluxe verb, double verb, prince tone, tremolo lux, or vibrato verb). I'd try the "prince tone" first. An alnico (blue/silver) speaker cab to add the sparkly highs, add studio compression block after the amp. My 2 cents, for what it's worth.