Its most probably equivalents to other Renaults most of it, but there is one thing to watch out for, does your car have an immobiliser (dont know the year on yours) you must use your current key-electronics (PLIP) on the new keyblade. If you dont have an immobiliser you must either use your existing PLIP (if the remote locking works) or get the matching roof IR-reciever as the "new" PLIP - these two are hard-coded together to get the remote working.
You can switch PLIP on keyblades, only note there is 2 different layouts on the keyblade in order to fit correctly on the PLIP so look carefully on yours first to know what layout you are looking for.
I would search and watch ebay for a complete kit or a wrecked car to buy from.
www.ebay.co.uk (loads of these J63's)
Good luck!