I was going to attempt this myself by using some ratchet straps and pulling it around a tube for the sheet and for the other piece I could get access to one of those flimsy vice mounted folders but think it'll not work.
The large sheet needs to be rolled on the long side for 150mm dia and the unrolled cone looking piece has 24 fold lines to make it into a circular to rectangular transition piece (see last pic)
The large sheet needs to be rolled on the long side for 150mm dia and the unrolled cone looking piece has 24 fold lines to make it into a circular to rectangular transition piece (see last pic)