The DOS65 group (Nico de Vries) developed an EPROM prgrammer for a wide variety of UV erasable EPROMS, called EP. Of course for the Elektuur bus on Eurocard format.
On this page photos, the article published in issue 56 of the club magazine, and the documentation of hardware and software.
The software itself EP.COM is e.g on DOS65 floppy image dos021 DOS65V2.0 , dos6509 etc. Search for EP1, EP2, EP3, EPTEST