[userbinator]

Apart from the usual sources of old/NOS stock, they are still being produced; a new one is rather expensive though:

http://www.digikey.com/product-detail/en/CP80C88-2Z/CP80C88-...

http://www.digikey.com/product-detail/en/IP80C88/IP80C88-ND/...

There's also a military-rated version (this is probably one of the reasons why they're still in production...) which is in the $500+ range and curently not in stock: http://www.intersil.com/en/products/space-and-harsh-environm...