I have a 2010 Touran with an RNS 310 system. The radio signal is terrible. I’ve had the aerial replaced with another VW one and various other things done which haven’t worked. I can’t afford to get a new or used RNS 310. I don’t need sat nav. Please can someone tell me what cheaper radio/CD player I could replace it with? Vindis won’t and I don’t want to buy a system on eBay only to find it won’t fit! Thank you