Is it possible to buy an adapter to convert a four pin keyboard to eight pin?

We’ve an good old keyboard which i really enjoy (It offers the good old school typewriter rat-a-tat-tat! ) — but the current system requires a good 8 pin setup.Anyway I could truthfully buy a adapter

Thanks

Do people mean ps2 in order to old-style DURING keyboard Adapters like these are still accessible:

http://cgi.ebay.com/ws/eBayISAPI.dllViewItem&item=370503664997

http://www.amazon.com/Keyboard-Adapter-MiniDin6-Female-Din5/dp/B0016RNTFY/ref=sr_1_32ie=UTF8&qid=1305231086&sr=8-32

Yes.