hello all so i work for a company that installs stereos and hands free kits etc. installed a parrot ck3000 to a golf mk5, (although i said the ck3000 isnt much cop)

any way next day lady comes back and says yes its crap, can i have the next one up, so yep no problem, but this time the heater vent came away from the facia, which ok wasn't a problem as its happened to me before. but this time this little part fell down (as far as i can gather) in to the centre of the dash. cant see it nor find it

i have put it all back together and customer is perfectly fine with leaving me to replace the part. but with no luck searching on google and no luck with the dealer is this some thing i can get a part number for or is it only complete with the whole vent assembly?