You wait for ages, then two come along at once!
In the SPCK shop today I found a world church prayer book called, surprisingly enough, Prayers Encircling the World. Published by SPCK in 1998 it does tend to be a bit 'special serivce' heavy and has quite a hefty proportion of 'white' if not 'northern hemisphere white western' stuff, but it looks promising. It looks like this:
It can also be picked up from Amazon second hand quite cheaply.
The book Stuart Jenkins alluded to, A Procession of Prayers by John Carden, comes in two editions with covers looking like
In due course I'll let you know my considered opinions on these! in the meantime, if you know of others I'd be delighted to hear from you.