Yeah, I've never seen one. Pretty expensive to buy the IKS-74U and bolt an ICS full length front end on it too... and the top cover is different too (and a pain in the hole as it obscures the screws needed to disassemble the thing, so you need a right angled screw driver - of course you could replace them with hex head cap bolts and use an Allen key, but you need the right angle to get them out the 1st time).
Edit to add: oh yeah, they're pozi screws too, so about the worst possible to get at with a right angle driver... but afaik they're simple to get to in their full length AK-74's, because the top cover comes right off.