If you're in the NW I'd recommend a call to Winfields Outdoors at Haslingden. They stock a wide range of kit and strike me as the sort of store where you might find a manager who's prepared to talk about prices for a big order.
Lorraine McCall began her attempt today at a continuous, self-powered round of the Grahams, a four-month tour of upland Scotland combining walking and bikepacking. If successful, she'll be the first person that we know of to do it.