fifos are expensive and difficult to use because of their very high speed and so on,I agree that a reasesment of the budget would be in order bearing in mind the fact that an asyncronous fifo in a pld is cheaper and easier to implement than a dedicated high speed fifo memory,saying that I want to do all this without it costing anything isnt very realistic.I dont know how fast he wants to transfer the data as you say but a dedicated fifo is likely to be extremely fast.