Oil cooler shopping list

[Matt]

Looking at buying an oil cooler ready for summer track time as my temps go up from giving it death in the evenings so dread to think what it will be like in the summer

So afaik The eBay kits are bad. Are the coolers bad or is it the fitting kits? 

I'd rather go for braided hoses and an fittings where possible

The only bit I don't really understand is the sandwich plate, I've looked and the Rallye has something that resembles it as standard, I'm guessing that's not it? 

Also if possible id like to fit an oil pressure gauge at the same time, can this be done using the sandwich plate?