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apart from a bit of conduit in the vice ive seen people make their own out of conduit ,
2right angle boxes legs of conduit ,length of 20mm bush coupled into the back of one 25mm the other 20 slides into 25 giving you ability to load and expand bit of a blue peter job
saw in wholesalers a multi pole unit other day eddys i think maybe city elec
Check out a 'Rackateer'. They are made in Canada and sold buy QVS electrical who are on the net. They will hold small reels to very big SWA cable reels. I have always used these and would not change.