[CMOTD]

With your long experience of slot racing both at home and club level this is a bit of a strange question Scott. You are bound to be aware of the multitude of controllers out there so what exactly are you looking for? If it's just a cheapy for home use then surely virtually any manufacturer's home set one can be wired up for a Policar track? They are all cheap as chips on eBay. I would assume you also have some Parmas and/or electronic ones for use at club level which could also be adapted.