Vic, I bought a replacement processor for my Paragon 585 last year from Poland: https://www.ebay.co.uk/itm/6805-MC146805E2P-MC6805-68HC05-8-bit-Microprocessor-1MHz/253610156822?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649 It cost me less than £2.00 Sterling. John G8CCD