Giraffehunter,
I don't see any photo's

Great pics! Beautiful mount..
I think I want them both standing. The klipspringer on a rock like that, and the Dik-Dik on something else. I just don`t know what.
And how to pose him as well... I took a picture of a Dik-Dik in Etosha, standing with one of his legs in the air. Maybe??

More pics and ideas, please..

Personally I would have the klippie with all 4 legs close together on a rock that comes out of the wall (if possible) and with its head held high as when they see you from far away.
I would do the dik dik with its head down and forward in that sulking position as if it was just about to take a step forward (leg poised over ground). You could put some thornbush behind the dik dik as they are cover loving.