Lpc2000

Got a question here.  I have a whole pile of 512KB SRAM memory chips 
(8-bit wide access, 19 address lines) and I would like to use them as 
a kind of "swap file" for SRAM usage, so I don't care too much about 
speed of access.  What would be the best way of hooking one of these 
up to a 2438 or 2338?  Directly is a bit of a pain because there 
aren't any large blocks of I/O pins available (without constantly 
reconfiguring the pins), I could use some external latches to save 
some pins, but then again a small 8051 uC with 8KB Flash and external 
memory bus and SPI/I2C costs $1.50, so if it's going to cost much in 
external components then I'd be better off just adding in an 8051 as a 
memory controller...

Anyone here have any better ideas?

Thanks!