Thank you for the suggestion, livingwater.
Perhaps you're familiar with Mary Hinton at the British Museum? She's running a research project on the framed sets of electrotyped ancients that the Museum sold for many years in partnership with the Ready family members who worked there. I have indeed reached out to her for info or a referral, but only just yesterday. Hope to hear from her with something helpful!
Look at the email address she uses: readyelectros@gmail.com!
I never pay too much for my tokens...but every now and then I may buy one a little too soon.