Beijer is a Swedish company and I had a look at Beijers Swedish webpage and in Sweden you can rent a kit with cables, converter, software¨, documentation for SEK 1000(aprox 140USD) per week. Not sure if you can renat abroad but you can try to give their PLC support at:+46 40 358607
The MAC 40 is now obsolete but the software is called mac programmer plus (I think) if it is still available it won't cost much as even the newer E-designer is less than £100.
But I believe you need an interface lead (232 to 422)