There is Colby Portable PC on eBay:http://www.ebay.com/itm/COLBY-PORTABLE- ... #ht_95wt_0
Not clear when this one was made, but these would have mostly sold before IBM came out with their own portable. The Colby was a portable case in which one could stuff the guts of genuine IBM PC. Notice that there are only 5 slots on the back, indicating it would take the earlier 5150 (PC) motherboard rather than a 5160 (XT) like IBM's portable.
The seller doesn't say if it has genuine IBM parts in it, but when these were made the idea was to have a genuine IBM product in a portable form before portable sufficiently compatible clones were widely available.
The Colby was also notable for offering a Macintosh version - reportedly on sale seconds after the 1984 introduction of the Mac.