If you don't like the brown plastic folder why don't you just go and buy a nice leather cover with gold edging from AFE or Transair? It makes it look a lot nicer... ;-)
Or just upgrade it to a Blue folder (CPL) or Green folder (ATPL)... ;-)
You've probably not seen an older FAA certificate... credit card size stiff paper with a few words on it. Still the new FAA certificates are very nice credit card plastic style with really nice designed background, (as well as the same wording).