Mike, the other thing you can try to improvise is setting up a "hardie" used in cutting mosaic smalti. Here's a link that shows a hardie with the martello (hammer).
http://mosaicsmalti.com/store/Product.asp?pid=24
You wold need to imbed the hardie into a think wood block, then create raised boards bringing you a "table top" of sorts, to just below the beveled blade edge of the hardie. Then you would need a carbide chisel and a rubber mallet to pound matching the two points of the chisels to chop your millefiori rod to create your murrine. The critical part to not waste your rod, is "Matching" the points.
If you are planning to use for commercial cutting, I'd say invest in the Dona version
! It's real purdy and you can afford it, buddy!!
Ofilia