Do you mean the standard grill? As I thought the only ones from vauxhall where all the same unless irmscher or steinmetz being the official tuning ones.
After washing rinse the car with an open ended hose and then dry with a drying Coth I also use a quick detailer at this stage to shine it up and get rid of any water spots. You can buy a filter but can not remember what the one I have is called....Other than that you could set up an ro system where you buy a vessel with some media that gives you demin water. Hope this helps.
You have a pm mate. The one I have seems to have the pruge valve already inside as it has two pipes going into it. If you reply to my pm I will send a pic of it.
I had a full kit mate not so long ago and I do mean full. The only parts of it I have left are the full side door mouldings I c the small wing ones. Let me know if your interested in them just in case you find the rest i bet it won't come with them.
I have found the speakers just got dig out the tweeters and the radio and changer codes once I have found them I will drop you a pm and we can go from there mate if your still interested that is. Lee.
I have a radio tape player and the changer and maybe able to help with the speakers. I will find out what the model number is of the head unit and changer so you can check if it's compatible if your interested mate. Unless your after the bose setup then I can not help sorry.