Someone has one for sale. Not my cup of tea, but if you really want one:
https://www.ebay.com/itm/Vintage-Percom-Electric-Crayon-for-TRS-80/332651439680
https://www.ebay.com/itm/Vintage-Percom-Electric-Crayon-for-TRS-80/332651439680
I've got one that works and doesn't have all the holes crudely drilled in the top of the case. It also has the original on/off switch still in the back and not rewired to the front.
Mike
Know anybody with a Blaine mailing address? 8-)