We have put an arch in the Yellow van...plan to do something with some cupboards along each side so that the wheel arch is concealed and a mattress can but put in between the cupboards, bit of something on the walls to insulate...but that is about it....did see some bright flouro looking material and in leapard skin which was all fluffy like the over the top rugs which used to be used in the 70's and 80's, very blingy, and over the top though.....
I meant to copy the diagram cut out which we got out of a custom vans and trucks mag from the 70's, and the pattern fitted perfectly...so if interested I will post up the diagram and instructions....