Space in camper vans is at a premium and I resent having to add quite a few more inches to the gas locker locker to accommodate a regulator plus a gauge and a generous bend in the hose to avoid kinking.
However, I have found from Viking marine a regulator with a threaded outlet allowing an elbow to be used for the connection to the hose down the corner of the locker thus taking no extra space. The regulator also has a side connection for a gauge which is a bonus.
The contact is http://www.vikingmarine.co.uk based in Goole.