I've been searching and ordering heater cores for my 92 RS and have been unable to find an original copper one. I've ordered from your usual parts stores to only find out that they only offer an aluminium one. I know the aluminium one will work but I would prefer to use the factory hold downs in the heater box to secure the core. So my question is has anyone found a supplier of a heater core that is a more direct fit? I have sourced a shop here locally that will re-core the one I have but at the price of $180 I thought I'd ask the experts here first. Thanks!