what you had on the golf was an water-oil cooler which uses water feed from your radiator to cool your oil, i have fitted air-oil coolers by using a sandwich plate which sits between your engine and filter, really easy to do.
as far as fitting an oil temp sensor and oil pressure i think you can get a sandwich plate with screw in threads you need to find out what size threads they are and make sure any guages you buy have same size.
best bet would be to take it to one of the renault specialists and get them to sort it mate they could even splice into circuits your car will already have monitoring these things, im quite happy using the water temp to keep an eye on engine temp i dont do track days in this car, i have had them on previous cars but not going to bother with the clio.