HELP, 964 sound proofing
 

hi all
my 964 had a small fire and I have had to replace the front carpet. well a company in liverpool is, I need the soundproofing material for the floor or any ideas on what to use as they say if they put the carpet down now then the it go into the wells on the floor and look uneven? any ideas or anyone know where to get some of this. Oh and I have tried a porsche dealer they want 200 for the 2 pieces and for material that goes under my carpet to stop it looking bumpy I dont want to pay that much!
any help would be appricated thanks

May as well use dynamat for that price.