Anywhere for bespoke OS maps?

I am looking to do a long road ride in a few weeks time but the areas i want to cover are on 4 different OS Landranger maps. Short of buying all 4 and carring them with me, is there anywhere where i can order or make up a bespoke map that will cover all the areas that i want?

For smaller areas i have printed out bits from multimap and stuck them together but not really wanting to do that for a large area that covers 70miles from south west tip to north east tip of the route.

Is there such a place that provides this service or is it a case of sticking bits of paper together again?