Size of bed / wet bathroom in a sportsmobile?

[Safari997]

We will travel for one year from Alaska to Ushuia.
We already do a 6 months trip in south west and Baja in 2013.
So we know what we are looking for!
Can you tell me if it's possible to have the concersion in the 4x4 Sprinter, hard top
Permanent bed (min of 75x54) cause i'm a small 6,3 guy!
Wetbath
Front dinette

Tell me! I never saw one with that size of bed!

Thanks,

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