I can highly recommend hour building with someone in the other seat. All sorts of good things you can practice. Also really useful for getting charts, out, doing hard IFR stuff. I can also say that you could try putting an ad at your local flying schools. When I went hour building I found 2 people who held PPLs but were definitely not looking to go down the commercial route and as such were looking for a good holiday, doing some flying, but ultimately just wanted to come along for the experience. Both paid half the flying costs and I logged the hours. What they logged I do not know or care. The CAA were never going to see their logbooks again anyway. But don't quote me!!!
Just a thought.