I personally haven't tried this, but for those hoping to find a reasonably-priced mono cartridge, Grado makes two, the
MC+ with conical stylus for $90 and the
ME+ with elliptical stylus for $150. Both have replaceable stylii as well.
For those of you with removeable headshells, this would be a smart buy and it would only take a minute or two to swap in the mono cartridge when you want to play Beatles mono pressings or other mono for that matter. In addition to 7 of the 2014 Beatles mono pressings, I also have several '50s-'60s mono classical albums such as orthophonic RCA shaded dogs; it might be worth it for me to get one of these myself.