Update (20th june 2014) -
Current pricing on midibox panels -
mb6582 panel sets (front and rear) - GBP 85
mbseq 19" panels (single panel) - GBP 80 / GBP 85
mbseq 17" panel sets (for desktop enclosure) - GBP 80 (top) GBP 35 (rear)
There may be some of the above in the 'shop here - http://thebeast.co.uk/?post_type=product
...but, if not, drop me a line, and ill cut-to-order.