I made up some adaptors to fit them to my mrs old mk1 as she really liked the vauxhall wheels:
I used VW hubcentric spacers (58mm ish IIRC) as a starting point and machined the inside out to 60.1mm to fit the clio and then machined the outside down to fit the vauxhall spigot properly.
I then bolted them onto the hubs to make them semi-permenant and used a stud and nut conversion to fit the vauxhall rims on and off with.
I think thats probably about the best possible way of doing it, but obviously a lot less hassle if you just fit wheels the right offset in the first place.
So fine for doing to fit a particular rim that you really want and is only available in vauxhall offset like my mrs wanted, but not so good just to use a random set of cheap wheels like you are on about doing, as if you need to get the adaptors made you'll be looking at wrong side of 100 quid realistically.