I found a 3x8 mahogany box online for ~$15.00. It will hold two razors and my small bottle of blade oil quite well.
I'm thinking of buying a strip of strop quality leather from the local leather shop and glueing it on the back. It won't have the same "spring" of a proper box or paddle strop, but I'm rarely away from my house for more than a week. Would a week's worth of stropping on that surface cause harm to my razor's edge?