Update:

Currently, as a short term solution, outputting the array as 16x HSEROUTs of 16x pairs of hex digits. Crude, but functional, and VB is able to convert this data back to its integer format at the other end. Not sure how much this slows things down compared to using a single HSEROUT [page_array\256] would be, or similar, were it possible to output a full 256 Byte array.