Have you tried Craft Data Limited? We've bought similar units from them in the past. Their website shows various Seiko thermal printers under surplus stock. They might be worth contacting:
Craft Data Limited, 92 Broad Street, Chesham, Bucks., United Kingdom. HP5 3ED
Tel: 44 (0)1494 778235 Fax: 44 (0)1494 773645
E-mail: sales@craftdata.co.uk
