You can get an offbrand 3 piece set of extension tubes to fit Nikon for probably under 30 dollars. Maybe under 15 bucks on ebay, I haven't checked. It is possible to make this unreasonably complicated, but unnecessary. With a macro lens like the 55mm (or the 40mm DX if you have a DX camera), a set of extension tubes, and a slide holder like the ES-1 or ES-2, one ought to be able to arrange a reproduction ratio between 1:2 and 1:1. That is what the ES-1 and ES-2 are designed for.
It might be possible to cook up some circumstance where one of the ES's is too long for the short macro lens at some ratio, but I am not sure this is a problem.
The annoying things are that the ES-1 is discontinued and the ES-2 is expensive. Also the ES-1 is designed for slides, and I am not sure its slide-holding area is deep enough to squeeze in a plastic negative filmstrip holder. I wish one of the companies that makes offbrand adapters and extension tubes and such, would make a generic copier accessory similar to the ES-1 or ES-2, but so far as I know this doesn't exist.
I have tried a sneaky workaround for this, using the ES-E28 (designed a thousand years ago for slide copying with small-lens digital P+S), and some step down rings. You would think this has no hope of working, but I think it actually may with the 40mm on a DX camera. This is definitely outside the realm of intended use, and it might not reach the right working distance with other lenses, or vignette. No warranty of merchantability or fitness is implied.