This may be irrelevant by this time, but wasn't somebody (Jay?) looking for an HP 8-bit duplex I/O interface a little while ago? If so, the seller of the Spike Jones 7900 platter has one up for sale: http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=5230762225&ssPageName=MERC_VIC_ReBay_Pr4_PcN_BID (just in case you didn't see it)